You can still earn a lot, and be on the edge. I'm not, but a lot are.

My tax burden isn't overwhelming, but I'd sure like to pay less rather than more. UBI would mean I'd have to pay more (no, "we'll just cut the overhead of existing social programs" will neither be enough -not by a long shot-, nor work, as we'll still need some/many of those social programs).

I'd very much prefer others working as well instead of me having to work more to make up for their not-working, ergo I'm not such a big fan of that kind of wealth redistribution. I'd like a wealth redistribution combined with a work-load redistribution though. They work, I work less, I make less money, they make money, the contribute.