[Capitalism is] the astonishing belief that the nastiest motives of the nastiest men somehow or other work for the best results in the best of all possible worlds.

John Maynard Keynes (1883-1946) English economist
(Attributed)

Attributed by Sir George Schuster, Christianity and Human Relations in Industry (1951). Frequently quoted, but no direct citation found. More information here.

Variations:

• "... the extraordinary belief that the nastiest of men for the nastiest of motives will somehow work for the benefit of all."
• "... the astounding belief that the most wickedest of men will do the most wickedest of things for the greatest good of everyone."
• "The great merit of the capitalist system, it has been said, is that it succeeds in using the nastiest motives of nasty people for the ultimate benefit of society." (written by E. A. G. Robinson, Monopoly (1941). (Robinson was a colleague of Keynes.)