"When Friedman was beginning his career as a public intellectual, the times were ripe for a counterreformation against Keynesianism and all that went with it. But what the world needs now, I'd argue, is a counter-counterreformation." - Paul Krugman (2007). Who Was Milton Friedman?, New York Review of Books, V. 54, N 2 (February 15)And this:
"What professional economics now needs is a rebellion against supply and demand. We need a rebellion against the idea that people are actually paid in proportion to the value of what they produce. We need a rebellion against the metaphor of the labor market - an entity that no one has ever seen, where no one has ever been, an entity that lacks the mechanishms of price adjustment that would be required for the marginal productivity theory to work. Economics needs a rebellion that is almost less against the system under which we live, as against the sources of our complacency about that system. We need a rebellion, not so much as against existing market institutions, as against the analytical tyranny of the idea of the market, as it applies to pay.
[Footnote:] Such a rebellion almost got going in the 1960s, when a dispute known as the 'Cambridge controversies' challenged the concept of capital as a factor of production and hence the coherence of the notion of marginal productivity. But the marginal productivity theory of the labor market survived that challenge, and its success in so doing is the root of the difficulty today." - James K. Galbraith (1998). Created Unequal: The Crisis in American Pay, Free Press: 265-266