It would be zero sum game when there's no more place for new people to be born and no resources to feed them. The current state of being is that there are plenty resources just wasted because of very technical reasons and finance industry is very successful at making ones rich virtually for nothing, while others starve (that is money isn't used to unify measuring of value, as it was initially intended, but more like making money is orthogonal to producing value).

Yeah, I know, it sounds like advocating communism. But what can I do if it so much naturally better in it's essence! And we would be pretty close to making it almost possible already, if not for that "pragmatic" ideology some people are spreading.