Actually I don't think so. Even Marx saw that socialism was a stage of history which followed from capitalism. In the same way that feudalism's aristocracy provides the conditions which create a merchant class that eventually overthrows the aristocracy, Marx sees capitalism and capitalists as providing the conditions which create a working class which eventually overthrows the capitalists. He would probably be annoyed with the soviets for trying to skip most of a phase and he would probably be annoyed with us, modern westerners, for not recognizing where in history we are - with rising inequality, increasing productivity but stagnating wages and the general increasing returns to capital.
>Marx's reserve army doesn't hold water.
Doesn't it? With chronic unemployment persisting since our most recent crash and now that we're finally reaching low unemployment ten years later, wages haven't moved much. If you explained the idea without mentioning Marx I think most people on the street would intuitively agree.