Keynes, Employment Policy and the Question of Public Debt

This article provides a simple formalization of income–expenditure equilibrium in accordance with the Principle of Effective Demand, but augmented to explicitly incorporate public debt. This is utilized to explore the conditions required for simultaneous achievement of full-employment growth and a sustainable public debt trajectory—the latter understood as stabilization of the ratio of public debt to aggregate income, at some desired level. In the spirit of Keynes's economics, demand-led, full-employment growth, driven by government spending, is reconciled with public debt sustainability so understood. The policy implications, illustrative of Keynes's policy views, are then drawn out.