"Enthusiasm" based systems don't work if there's no reward for the enthusiastic worker. In the CCCP (USSR) the only "enthusiastic" ones were the political leaders, who were able to get anything they wanted for themselves and their families. The average citizen could look forward to little but more work for no gain, while those who did no work still got fed, clothed and housed.
So you're better off being lazy? You get fed, and you don't have to work! Sounds great to me.Since resources are getting sacred there is no better option than communism, which favors laziness instead of diligence (which is synonym of greed) and if you are greedy then you are forced to feed all lazy ones around.
Which means everyone but the guy with the resources starves. Sounds like the USSR, all right.This way resource consumption severely decreases.