It's a common way for attempts at communism to fail. Try reading Animal Farm, it was written by a socialist as a warning about the corruption of the attempt toward rules an elite that opposes everyone else and steals the wealth of the common worker.
Then how come it never has been prevented any time communism on a state level has been tried? The only conclusion would be it isn't actually known or the goal is of communist revolutionaries is to form an elite that oppresses everyone else and steal the wealth of the common worker.