Well the average income would be ~43000USD (bls.gov), which is not that bad. Also you should consider that communism would turn the world upside down, to stand

Well the average income would be ~43000USD (bls.gov), which is not that bad. Also you should consider that communism would turn the world upside down, to stand on it's feet. Meaning a lot of professions would simply fade away, mainly the ones created solely because of the fetish of "making money." And the true product would arise. Science and technology could flourish as government grants, and so on would be of no use. Everybody could study without thinking about the useless dept. Financial bubbles that cost so much would simply be eradicated. But then again, it is the simple thing, that is hard to realize.