alt Hacker NewsMinimum wage isn't directly comparable, because that's the government setting a rule on what two private parties can agree to. It's not the government but the employer who pays it.
UBI is distributed by the government directly, so it's basically a question of what gets taxed, how much inflation results, and whether that inflation and taxation proves more unpopular than the UBI is popular.
This is silly. To a first approximation, zero percent of the opposition to minimum wage increases comes from a principled stance of "I support taxation, even high taxation, but I am opposed to the government interfering in private labor market contracts"; 100% of it is from "they're taking my money!". There is no reason to expect any less opposition from the much, much larger amount of wealth redistribution which would be required by UBI.