[run4yourlives]

Well, for one, it fails to address the inherent need of people to achieve for personal/selfish reasons, thus removing life purpose for many of your best and brightest - it kills ambition.

Ambition is what drives humanity forward, for better or worse. Unless you can channel the needs of the state as a replacement for personal ambition, your society under communism is unsustainable. This is very difficult to do without reverting to a society that is either 1) capitalist or 2) utterly corrupt.

Either way, communism is self defeating, and therefore dangerous.

EDIT: Just to note that I upvoted you and encourage others to do the same. This is a place to share knowledge and you asked a perfectly valid question that many people have. This is not reddit and nobody should be downvoted for asking a question, regardless of how basic it might be.

[morestuff]

I'm not so sure that it's clearcut that personal/selfish ambition is exactly identical to financial ambition. Further, there's probably a few different configurations of societies that distribute wealth evenly that are compatible with financial ambition. As for corruption, you probably need to convince someone that capitalist corruption is better :)

[run4yourlives]

I'm not so sure that it's clearcut that personal/selfish ambition is exactly identical to financial ambition.

It really doesn't matter if they are or not. In order for communism to truly work, you'd need to abolish all rewards. That is, the very act of having hockey players and cosmonauts and musical talent recognized by the state at large - regardless of financial reward - creates the very imbalance that communism is supposed to address. As I said: self defeating.

People may seek different rewards based on their character, but the very nature of man is that we work best when challenged and respond will to the rewards earned when overcoming those challenges, financial or not.

If your economic system essentially requires a man with a gun to ensure and enforce its existence, there is something wrong.