To my (small) understanding, the problem with Communism is that if nobody in the country can rise above a certain point of financial status and everybody's going to be paid regardless of the work they output, then there's no motivation, nobody puts any effort into the work, and the country's economy falls into shambles, making for a very poor --- and thus very unhappy --- country. Correct me if I'm wrong, though, I'm always up for learning something new. And also, I'm not saying Communism is bad, it's fine and all, it's just that I doubt it can work successfully. That's all.