The Classical Theory of Employment and Say's Law

The classical economists (Adam Smith, David Ricardo, J. B. Say, A. C. Pigou and others) believed that a free-market economy automatically tends towards full employment of all resources. Any unemployment, in their view, could only be temporary or voluntary, and market forces would quickly restore full employment without government intervention.

The cornerstone of the classical view is Say's Law of Markets, usually summed up as "supply creates its own demand." The idea is that the act of producing goods generates, at the same time, an equal amount of income (wages, rent, interest, profit) in the hands of the factors of production — and this income is exactly enough to buy back everything produced. Therefore, argued the classicals, there can never be a general over-production or a lasting shortage of demand for the economy as a whole.

The classical system rested on the assumption that all income earned is ultimately spent — either directly on consumption or, if saved, indirectly through investment. Any gap between saving and investment was assumed to be closed automatically by a flexible rate of interest: if saving exceeded investment, the interest rate would fall until the two were equal again.

This chapter follows the standard macroeconomic treatment of employment theory taught nationally; the Tamil Nadu HSC syllabus draws on the same principles.