UBIs also have the capacity to expand the workforce. As I age, I find my social circle increasingly includes people who can't work a traditional 9-5 job -- whether that's temporary (caring for an ill family member, early parenthood, etc.) or permanent (illness, disability, harmed on the job).

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.