Communism just turns an entire country into a single company that is the police as well and therefore that company doesn't even have a choice: it must use violence against its workers, just for public order. And, by definition, a lot of people can do better for themselves under communism and must be prevented from doing so ... That's the source of one criticism of communism: that communism effectively replaces money with violence. And what always goes wrong is that some psychopath realizes that a single central decision point that enforces it's decisions through violence ... yummy. People in Eastern Germany lived this, involuntarily: difference between fascism and communism ... there is no practical difference. Central undemocratic all-encompassing decision making enforced through violence is oppression, and of course, you cannot have democratic socialism. In theory it's obvious, and in practice, Israel tried that and they voted to end socialism as soon as it was realistic, even though a LOT of institutions in Israel are still communist, they are far less capitalist than China is.