I would argue that it was already a window dressing under Stalin; more so than afterwards, in fact, given that it was fairly common for high-level party functionaries and other important figures to have e.g. domestic servants.

Then again, if we take pure Marxism, a socialist revolution was supposed to be impossible in Russia anyway, simply because proletariat was not the majority of the population. Lenin and co had to do a lot of handwaving to explain that away, and one could reasonably claim that the result deviated sufficiently from what Marx had in mind that it shouldn't really be lumped together.