The Stakhanov system destroyed worker solidarity by manufacturing intra-class competition and privilege.

Evidence

The next class to be liquidated as a group were the workers. As a class they were much weaker and offered much less resistance than the peasants because their spontaneous expropriation of factory owners during the revolution, unlike the peasants’ expropriation of landowners, had been frustrated at once by the government which confiscated the factories as state property under the pretext that the state belonged to the proletariat in any event. The Stakhanov system, adopted in the early thirties, broke up all solidarity and class consciousness among the workers, first by the ferocious competition and second by the temporary solidification of a Stakhanovite aristocracy whose social distance from the ordinary worker naturally was felt more acutely than the distance between the workers and the management. This process was completed in 1938 with the introduction of the labor book which transformed the whole Russian worker class officially into a gigantic forced-labor force. — Hannah Arendt, The Origins of Totalitarianism, 765