Well bully for you. If I want to keep my current job, I'm expected to be here from 8:30 to 5:30pm, except a lunch break. Of all the recruiters that contacted me in the past month (and there were 7 or 8 of them), every single one of those companies expected at least 8 hours of work, and probably more (games industry).
There was one probable exception, a consulting company, but I have no desire to live out of a hotel 4+ days a week.
I have done Freelance in the past, but hunting down work is something I'm not very good at, as I'm not really the type that can put myself out there and cold call people very easily, so I had difficulty finding enough work to keep me going.
But if I could get away with working 30 hour weeks and make about 20% less than I normally would, and with full benefits, I'd be much happier, and probably more productive. Very few companies would agree to such a deal, though.
UBI is about society as a whole, not you specifically.
Uh, yes it was? The modern 40 hour working week is a direct result of legislation: