Lest we forget:
"General envy constituting itself as a power is the disguise in which greed re-establishes itself and satisfies itself, only in another way. The thought of every piece of private property as such is at least turned against wealthier private property in the form of envy and the urge to reduce things to a common level, so that this envy and urge even constitute the essence of competition. Crude communism is only the culmination of this envy and of this levelling-down proceeding from the preconceived minimum. It has a definite, limited standard." [From Marx's Economic and Philosophic Manuscripts of 1844]
Of course, I could just be flanneling.