because communism is an ideal, like pure capitalism or the perfect peach ice cream. and the world is not an ideal place. you could never have total communal ownership in which some group doesn't exercise at least some power over another. from each according his ability to each according to their need sounds good, but because people are inherently flawed and prone to exploit collective situations at some point the people with ability will take more than their fair share.
---- bshelly
"You (Fisher) could get fired, Les Snead could get fired, Kevin Demoff could get fired, but I will always be Eric Dickerson.” (c) The God