"Quite in contrast to the frequently uttered cliche that Marx and other socialists taught that the desire for maximal material gain was the most fundamental human drive . . . socialists believed that it is the very structure of capitalist society which makes material interest the deepest motive, and that socialism would permit nonmaterial motives to assert themselves and free man from his servitude to material interests. (It is a sad commentary on man's capacity for inconsistency that people condemn socialism for its alleged 'materialism,' and at the same time criticize it with the argument that only the 'profit motive' can motivate man to do his best.)"
Erich Fromm "Let Man Prevail" (1960)