If a 19th century capitalist Machiavelli had wished to cripple the socialist intelligentsia of the 20th century, he could have invented no more cogent weapon than the labour theory of value. Yet this theory was the invention, not of a defender of capitalism, but of its greatest critic: Karl Marx.
Chapter 13, Nothing To Lose But Their Minds, p. 270–271 (See also: Adam Smith, Wealth of Nations, Book I, Chapter VI, p. 58) - Debunking Economics - The Naked Emperor Of The Social Sciences (2001)