How Keynes’ smuggled Marx’s concept of labor power into his General Theory
In chapter 4 of his General Theory, Keynes is looking for a quantitative unit of measure that reflects his subject of inquiry: what determines the level of employment? He was looking for a unit of measure that was, in his words, “appropriate to the problems of the economic system as a whole”.
When I first read this statement, I was confused, since it seemed obvious to me that the currency was the unit of measure in bourgeois economics. In this sense, I thought, bourgeois economics differed from labor theory, because the latter’s unit of measure is some definite weight of a commodity money. Since bourgeois political-economy rejects the notion of value, I assumed it was left with only the currency.
It turns out that I was wrong. Keynesian economics does not use the national currency as its unit of measure at all. The reality is much more interesting.