$1000 is not enough to quit their jobs or get a nice apartment. They could move slightly closer to work if they have to commute. It's not enough for a real tuition or to support them to study instead of work. I don't think we've ever had a universal basic income test. We have always missed the universal and basic part. It's below basic and not at all universal. I suspect that you need to get international cooperation…
People have different definitions of UBI, but in my mind 'basic' doesn't translate to quitting your job and not working. People in a functioning society still have to work.
There's nuance worth teasing apart here.
The only definition I've ever heard is that UBI allows you to lose your job and still be able to pay for the basic necessities (food, water, shelter, transportation, etc.). Anything less misses the whole point.
However, just the basic necessities would make for a pretty dull and repetitive life, which most people hate. And so the idea (as I understood it) is that it's not supposed to go beyond that, so your incentive would still be to keep your job if you at all can, not quit it.