Q.Why the proportional income tax acts as automatic stabilizer?
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The Fiscal Policy Multiplier: Why One Rupee of Government Spending Can Move the Economy by More Than One Rupee
Imagine you are in a small town. The government decides to build a new road and pays a contractor ₹100 crore. The contractor uses that money to hire workers and buy cement. The workers, now with extra income, go to the local grocery store, buy food, and pay the shopkeeper. The shopkeeper, in turn, uses that money to restock his shelves from the wholesaler. The wholesaler then pays his staff. That original ₹100 crore has now turned into income for many more people than just the contractor.
This chain reaction is the core intuition behind the fiscal policy multiplier.
The Precise Meaning
In macroeconomics, the fiscal policy multiplier measures the magnitude of the ripple effect that an initial change in government spending (or taxes) has on the final national income (GDP).
Multiplier (k)=ΔGΔY
Where:
- ΔY = Change in national income (GDP)
- ΔG = Change in government spending
If the multiplier is 2, then a ₹100 crore increase in government spending will eventually increase national income by ₹200 crore. If the multiplier is 0.5, the same ₹100 crore will only increase income by ₹50 crore (which can happen if the spending crowds out private investment).
Why It Matters: The Two Sides of the Coin
The multiplier is the reason governments use fiscal policy actively.
1. Fighting a Recession (Expansionary Policy): When the economy is sluggish and unemployment is high, the government can increase its spending (ΔG>0). Because of the multiplier, a relatively small increase in spending can generate a much larger boost to total demand and income, pulling the economy out of a downturn.
2. Controlling Inflation (Contractionary Policy): When the economy is overheating and inflation is rising, the government can cut its spending or raise taxes. The multiplier works in reverse — a small cut in spending can lead to a larger fall in aggregate demand, cooling down the economy.
The Formula from Your NCERT Textbook
The NCERT Class 12 Macroeconomics textbook derives the multiplier in a simple two-sector economy (households and firms, no government or foreign trade). The key assumption is that people spend a fixed fraction of any extra income they earn. This fraction is called the Marginal Propensity to Consume (MPC).
MPC = ΔYΔC — the change in consumption spending divided by the change in income. If MPC = 0.8, then for every extra ₹100 of income, people spend ₹80 and save ₹20.
The multiplier formula in this simplest case is:
k=1−MPC1
Let's see why. If the government spends ₹100 crore:
- Round 1: Income rises by ₹100 crore (the initial spending).
- Round 2: People spend MPC × ₹100 crore = ₹80 crore. This becomes income for others.
- Round 3: Those people spend MPC × ₹80 crore = ₹64 crore.
- And so on, in an infinite geometric series.
The total increase in income is:
ΔY=100+80+64+51.2+⋯=100×1−0.81=100×5=500 …
Because the tax is a fixed proportion of income, tax collections move up and down automatically with income, without any fresh decision by the government.
…
A proportional income tax rises automatically in booms and falls in slumps, cushioning demand without any deliberate government action, so it is a built-in (automatic) stabiliser.
An automatic stabiliser is a feature of the budget that reduces fluctuations in income without the government having to take any new policy decision. A proportional income tax works this way:
- During a boom, incomes rise, so tax collections automatically increase. This reduces disposable income and holds back the excessive rise in aggregate demand, checking inflation.
- During a recession, incomes fall, so tax collections automatically fall too. This leaves people with relatively more disposable income, supporting consumption and preventing demand from collapsing further. …
Showing the 12 most recent of 14 on this concept.
- CBSE 2026Set MARCH1 markQ.Mention any one fiscal variable which influence aggregate demand.
›Reveal solutionSolution
Government expenditure is one fiscal variable that influences aggregate demand (taxation is another).
Aggregate demand is affected by the government through its budget. A rise in government expenditure directly adds to total demand and, through the expenditure multiplier, raises income by a larger amount; a change in taxes affects disposable income and hence consumption demand. Any one of these budgetary instr …
- CBSE 2026Set ANNUAL1 markMCQQ.Steps taken through the government budget can influence(a) Inequalities(b) Allocation of resources(c) Inflation(d) All of these
›Reveal solutionSolution
The budget can influence inequalities, allocation of resources and inflation, so the answer is (d) All of these.
The government budget is an instrument for achieving several objectives. Through taxation and expenditure it can: reduce inequalities of income and wealth (by taxing the rich and spending on the poor); reallocate resources towards socially desirable goods and away from harmful ones; and promote economic stability by controlling inflation (surplus budget) or deflation …
- CBSE 2025Set ANNUAL1 markMCQQ.Which fiscal measure is to be adopted in correcting inflationary gap? (A) Reduction in public expenditure (B) Tax increase (C) Increase in public debts (D) All of these
›Reveal solutionSolution
All listed fiscal measures reduce excess demand, so the answer is (D) All of these.
An inflationary gap arises when aggregate demand exceeds the full-employment level, pushing prices up. To correct it the government uses contractionary fiscal policy: (A) reducing public expenditure directly cuts aggregate demand, (B) increasing taxes lowers disposable income and private spending, and (C) increasing public debt (more borrowing from the public) withdraws purchasing po …
- CBSE 2025Set ANNUAL1 markQ.According to which article of the Constitution of India, the Annual Financial Statement (Budget) of the government of India is presented before the parliament?
›Reveal solutionSolution
Article 112 of the Indian Constitution mandates the presentation of the Annual Financial Statement (Budget) before Parliament.
Article 112 of the Constitution of India requires the President to have an 'Annual Financial Statement' — commonly known as the Union Budget — laid before both Houses of Parliament, showing estimated receipts and expenditure of the Government of India for the coming financial year. This ensures Parliamentary oversight and approval of government finances, a core principle of …
- CBSE 2025Set ANNUAL1 markMCQQ.A fiscal policy measure to correct situation of excess demand is a/ an(a) increase in government expenditure(b) decrease in government expenditure(c) increase in price level(d) decrease in taxes
›Reveal solutionSolution
Excess demand creates an inflationary gap because planned aggregate demand exceeds the full-employment level of output; the correct fiscal response is to lower aggregate demand, which a decrease in government expenditure achieves directly.
Excess demand arises when the aggregate demand for goods and services in the economy, at the full-employment level of output, is greater than the aggregate supply the economy can produce at that level. Since output cannot rise further in the short run (resources are already fully employed), this excess demand spills over into a rise in the general price level — an inflationary gap.
Fiscal policy — the government's use of its spending and taxation powers — can be deployed in two broad directions:
- Contractionary fiscal policy, used to correct excess demand: reduce government expenditure, and/or raise taxes, both of which withdraw purchasing power from the economy and pull aggregate demand back down toward the full-employment level.
- Expansionary fiscal policy, used to correct deficient demand (a deflationary gap): raise government expenditure and/or cut taxes, to boost aggregate demand. …
- CBSE 2024Set ANNUAL1 markMCQQ.Which is included in Fiscal Policy? (A) Public Expenditure (B) Tax (C) Public Debt (D) All of these
›Reveal solutionSolution
Public expenditure, taxation and public debt are all instruments of fiscal policy, so the answer is (D).
In the BSEB Inter / Class-12 Economics government-budget unit, fiscal policy refers to the government's use of its revenue and expenditure (the budget) to influence output, employment and prices. Its main instruments are: (A) public expenditure — government spending that can be raised to boost demand or cut to curb it; (B) taxation — direct and indirect taxes that affect disposable income and demand; and (C) public debt — government borrow …
- CBSE 2024Set ANNUAL1 markMCQQ.Fiscal policy refers to -(a) only revenue policy of the government.(b) only expenditure policy of the government.(c) both revenue and expenditure policy of the government.(d) None of these.
›Reveal solutionSolution
Fiscal policy covers both government revenue (taxation) and government expenditure, used together to influence aggregate demand, growth and stability.
Fiscal policy is the government's policy regarding its own budget — it has two sides: the revenue side (how the government raises resources, chiefly through direct and indirect taxes, along with non-tax revenue) and the expenditure side (how the government spends, on both revenue account and capital account — subsidies, salaries, infrastructure, etc.). The government uses changes in both taxation and spending together — e.g., cutting taxes or ra …
- CBSE 2023Set ANNUAL1 markQ.Diagramatically show the effect of change in tax on the income equilibrium.
›Reveal solutionSolution
On the Keynesian cross, higher taxes shift the AD schedule downward and lower equilibrium income; lower taxes shift it upward and raise income.
Diagram (described): take income/output Y on the horizontal axis and aggregate demand AD on the vertical axis, with a 45-degree line showing AD = Y. The economy's equilibrium is where the AD schedule cuts the 45-degree line, at income Y.
- A rise in taxes reduces disposable income, so planned consumption falls. The whole AD schedule shifts downward (parallel), its new intersection with the 45-degree line lies to the left, and equilibrium income falls from Y to a lower Y1.
- A cut in taxes raises disposable income and consumption, shifting AD upward and raising equilibrium income. …
- CBSE 2023Set ANNUAL1 markMCQQ.Who is the Finance Minister of India?(a) Narendra Modi(b) Amit Shah(c) Rajnath Singh(d) Nirmala Sitharaman
›Reveal solutionSolution
The Union Finance Minister of India (who presents the government budget) is Nirmala Sitharaman, so the answer is (d).
The Finance Minister is the Union minister in charge of the finances of the Government of India and presents the annual budget. Among the options, Nirmala Sitharaman holds this office (the others listed hold or have held other portfolios). This links to the Go …
- CBSE 2023Set ANNUAL1 markMCQQ.If the amount of tax remains unchanged and the marginal propensity to consume is 4/5, and government expenditure increases by Rs. 100, national income will increase by—(a) Rs. 500(b) Rs. 400(c) Rs. 200(d) Rs. 100.
›Reveal solutionSolution
Multiplier = 1/(1−MPC) = 5; ΔY = Multiplier × ΔG = 5 × 100 = Rs. 500.
When taxes are unchanged, the government expenditure multiplier is k = 1/(1−MPC). Here MPC = 4/5 = 0.8, so k = 1/(1−0.8) = 1/0.2 = 5. The resulting rise in national income is ΔY = k × ΔG = 5 × Rs. 100 = Rs. 500. Intuitively, the initial Rs. 100 of government spending becomes income for someone, who spends 4/5 of it (Rs. 80), whic …
- CBSE 2022Set ANNUAL1 markQ.Identify which budgetary policy may be the most effective means of increasing the total volume of savings and investments in an economy where the propensity to consume is normally high ?
›Reveal solutionSolution
Taxation policy (tax incentives for saving/investing, and higher taxes to curb consumption) is the most effective budgetary tool here.
When the average/marginal propensity to consume in an economy is normally high, households voluntarily save only a small fraction of any additional income, so savings and investment will not rise on their own. The government's budgetary (fiscal) policy can correct this through its taxation policy: by granting tax concessions, rebates and exemptions on income that is saved or invested (e.g. deductions for provident fund contributions, insurance premiums, or investment in specified instruments), the government makes saving and investing more attractive relative to consuming. At the same time, taxing consumption-heavy goods more heavily discourages excessive spending. Because taxation directly changes the post-tax return to saving/investing versus consuming, it is considered the most effective budgetary instrument for raising the total vol …
- CBSE 2022Set ANNUAL1 markMCQQ.State whether the following statement is True or False : Fiscal policy is concerned with public revenue, public expenditure and government budget.(a) True(b) False
›Reveal solutionSolution
True — fiscal policy works through the three budgetary levers of revenue, expenditure and the deficit.
Fiscal policy refers to the policy of the government regarding taxation (public revenue), spending (public expenditure) and borrowing, all of which come together in the annual government budget. By raising or lowering taxes, increasing or cutting spending, and running a surplus or deficit budget, the government can influence aggregate demand, employment, price stability and growth in the economy. This di …
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