The robots, of course! Joking aside, though, I believe the idea is that, because UBI is subsistence-level, there's still an incentive for those who can earn mor

The robots, of course! Joking aside, though, I believe the idea is that, because UBI is subsistence-level, there's still an incentive for those who can earn more (presumably by producing something) to do so, such that they can afford greater luxuries. Although I'm not categorically opposed to UBI (for some definition of "B"), I am indeed, often concerned that proponents are taking their own personal attitudes and experiences, extrapolating to all other humans, without fully considering less appealling parts of human nature or potential negative emergent/systemic effects at scale.