While no inference is intended here, it is worth noting, in connection with Milton Friedman's comment that "Kelso just turned Marx upside down," that it is not necessarily amiss to turn a fellow upside down if that in fact straightens out his thinking.
Louis O. KelsoMoney is not a part of the visible sector of the economy; people do not consume money. Money is not a physical factor of production, but rather a yardstick for measuring economic input, economic outtake and the relative values of the real goods and services of the economic world. Money provides a method of measuring obligations, rights, powers and privileges. It provides a means whereby certain individuals can accumulate claims against others, or against the economy as a whole, or against many economies.
Louis O. Kelso