The flaw of communism is that purges are hard and you want to go to bed but if you don't purge these capitalist roaders they'll restore bourgeois control over the state and instead of implementing a system where the ceaseless accumulation of wealth is discouraged you just let the sociopathic parasites win. But hey at the end of it all you could say it was because people were just too greedy and not because every institution and law under capitalism is designed to reward greed.