> Your pay is not tied to how many hours you work as we are overwelmingly talking about sallried profesionals on HN.
Maybe not hours. But definitely some unit. There is always a pay rate, whether the denominator is "hour" or "month" or "year".
PTO is a way to diddle the denominator -- a way of saying that a "year" isn't 52 weeks, it's 50 (or 46 or whatever) -- without changing the numerator. It increases the rate, but not how much money you get.
UTO just keeps the rate fixed.
Admittedly PTO is better HR "marketing" or "optics" -- the company and/or politician can say they're "paying you even when you're not working", which sounds wonderful. Yet people burn time worrying about how it works, and is it fair. And the economic reality is you're only getting paid for working.
Admittedly I don't know if UTO would actually help. It may be the case that people inclined to agonize over HR stuff or game the system will still find a way.