You say it's rarely for its own sake, that doesn't really matter if the end destination is still the same. So say somebody doesn't want more money for its own sake, but instead it's an ego / status thing to have MORE than the other people who he compares himself against. If this person has more influence on our system than thousands if not millions of others, they'll ensure things go down in flames before we have something that works for everyone, because it threatens his current status.
True, there are some who make it to the top shelf, and then want to be at the top of that. On the other hand, there are others who feed their egos by helping the poor, donating to charity, etc. Some people are both.
But I think a lot of futurism is pointing to a real diminishment of scarcity in a way that we've never seen before. People fight over resources because of scarcity, but what happens when a resource becomes practically unlimited? In a lot of ways, I think we're approaching that for labor.
In a lot of ways, history bears this out (again, the rising tide lifting all boats); as mankind has gotten more prosperous, so too have the poor.
I don't believe at all in that last sentence, btw. It may be true of a few weirdos, but not in sufficient numbers for them to win the day. It's just not in evidence IMO.