“The fact is that the choice between Socialism-from-Above and Socialism-from-Below is, for the intellectual, basically a moral choice, whereas for the working masses who have no social alternative it is a matter of necessity. The intellectual may have the option of "joining the Establishment" where the worker does not; the same option holds also for labor leaders, who, as they rise out of their class, likewise confront a choice that did not exist before. The pressure of conformity to the mores of the ruling class, the pressure for bourgeoisification, is stronger in proportion as personal and organizational ties with the ranks below become weak. It is not hard for an intellectual or bureaucratized official to convince himself that permeation of and adaptation to the existing power is the smart way to do it, when (as it happens) it also permits sharing in the perquisites of influence and affluence.”

Hal Draper, " The Two Souls of Socialism https://www.marxists.org/archive/draper/1966/twosouls/index.htm," New Politics 5, no. 1 (Winter 1966), 57-84.