Honestly, it is more complicated than people are making out.
Soviet workers experienced increased relative living standards from 1929, and perceived their increases to be continuous and probable until the great patriotic war. This was contrasted with the kholkhoz, (as opposed to sovkhoz) policy producing a new and angry proletariat, who were only brought into the system by perceived skill advancements. The GPW is a thing unto itself. So prior to 1949, there were systemic limits on the desire to externally migrate because of forced internal migration and an unwillingness of major external migration targets to accept migrants, even in permitted (10 million peasants?).
Post GPW a significant body of proletarians had bought into the system: you pretend to pay, we pretend to work.
Similar relations in the soviet-style societies, but with periodic attempts at revolution (1953, 1956, 1968).
yours,
Sam R.