Keynes posited that government deficit-spending could boost an economy’s output of goods and services when it is short of full-employment. In the context of an economy near full-steam, tax cuts and/or more government spending could trigger inflation while adding little to GDP. To maintain balance in the government accounts, government surpluses during the ensuing upswing are used to pay off the accumulated debt. This is the theory. Unfortunately, it seems to be at odds with representative democracy. Specifically, a systemic bias exists in favor of recurrent deficits, and thus accumulating debt.
The full essay is at "The Keynesian Drug."
Sources:
Brutus, Letter 8, January 10, 1788, 2.9.95, in Herbert J. Storing, ed., The Anti-Federalist, (Chicago: University of Chicago Press, 1985).
Alan Simpson, Newsweek, December 27, 2010, p. 28.