I can’t help but think that UBI would distort job markets. Let’s pick an example of a “sucky job” (and I say this as just an example, I realize these guys work hard and are vital). A garbage man. He get’s paid $42k a year because they have to find people who would be willing to do this sucky job and need to pay higher than minimum wage to do so. At some point of income, people would be willing to accept the suckiness…
At least in New Zealand, those who can claim a benefit from the Government end up in a welfare trap, because we reduce welfare payments as you regain an income. There's no immediate financial benefit to you, the welfare recipient, in working 10-20 hours vs. not working at all.
There's a whole philosophical discussion involved in whether those people should have to work, but rightly or wrongly, a lot of societal and personal value is derived from employment. A UBI deletes the welfare trap, and allows people who exist on the margins/are incapable of full-time work to find and immediately benefit from employment again. Maybe the garbagemen will need to be paid more, but we should also see more part-time workers put their hands up.
A UBI would certainly change job markets; I'm not sure whether "distort" is the right word.