Unclear. But eventually, people would work. People get bored, it’s nice to have something to do, and get paid extra on top of it.

UBI just ensures that if they don’t like a job, they can just quit, rather than be forced to keep working on pain of starvation.

Tests so far seem to be fairly positive about it working. People who get UBI aren’t likely to sit on that money, they’ll just go and spend it either paying back debts, or buying something nice for themselves, so the money will keep going around. They might even buy more than they might otherwise have, if they’re not just scraping by.