I know people who believe the end state is a Star Trek-style post-scarcity world.

This is not the same thing as communism. You can still have private ownership, differing levels of wealth, competition, and individualism. It's just that having money is not necessary for survival or to lead a reasonably comfortable life.

And they don't believe it will magically happen -- it will take intentional action by governments to get there. This is, perhaps, the reason the AI labs are talking so much about AI replacing people's jobs. It's not arrogance, it's to make sure our leaders are thinking about this now instead of when it's too late to guide the outcome.