And I don't necessarily think it's a bad thing. I know it's probably common to compare the Communist regimes to the prison, but let's look at that objectively. The inmates have clothes, roof, work, and some leisure time. The basic needs are satisfied. To the cave men, that would seem like a very decent life. Nobody is dying from hunger. There's even some medical service. At least, much more than you could wish in the tribal society. Some leisure time allows for some intellectual and creative life, like books and art. So, the Communism exists now. For the cave men though.
If that would seem like stretching it out, let's look closer to a typical person on the financial relief (like Welfare) in a typical bloody-sucking capitalist country. That person would have free: one-room apartment, food, clothes, etc. and don't even have to work for that! Isn't that the Communism a typical proletarian of the end 19th century would dream? It's right here, before our eyes! No need for Great October Socialist Revolution, Civil War, Industrialization...
Why the prison or the welfare is not acceptable for everyone? Obviously it's due to the social competition, which I think is a positive and constructive optimization force. We want to maximize our comfort and minimize our efforts. It's thanks to that drive that we're not in a cave right now.