I agree that it is sort of the idea that sounds great in concept but would be incredibly unlikely. In fact, I will say with fair certainty that this could never be close to a reality from where we are now.
However, I don't think there is anything in human nature suggesting that we couldn't live in a way such as this. Greed and ambition aren't "in our blood," they are matters of chemicals in someones brain, and it's not like they are impossible to eliminate. Communism was not a bad idea in principal, but people even then were just too greedy to use it right. Not because they were born that way, but because they were made that way. Society creates us a lot more than we create it now. It has nothing to do with whether humans are naturally greedy and cannot share.
The problem is, of course, that we've already dug ourselves too deep of a hole. I'm sure the poor would be happy to give this kind of equal system a try, but the rich have too much and would not be inspired to give it up for a chance at fairness, not because they are human but because they are a part of this capitalist, "free" society. And all the power is with the rich. so the change would have to originate from them, and that's not going to happen.
So my main point is that there is nothing to laugh at or ridicule here, as it is as damn close as anything could get to an equal and fair society, but we have dug ourselves deep into capitalism and inequality so that people are born and raised with it imprinted in their brain. This would never work, but it's ideals are fascinating, I think.