UBI is kind of cool but it has some massive flaws. For example: Landlords and groceries can just raise prices to bring the cost of living up and since there are no rent/price controls (because "that would be communism") we'll be right back to where we started. What you want is Universal Basic Services. Anything you need to live is free. Literally impossible for anyone to game that system and equally impossible for people to slip through the gaps, but it's also never going to happen because "that would be communism"
So yeah this is why capitalism has go to, because any attempt at actually making a just and fair society will be dismissed as "being communism"
Norway doesn't have a minimum wage because the unions don't want one. They believe having a set minimum wage sets a low anchor for negotiating, and that they can negotiate higher wages without one.
Select industries do have a minimum wage for their specific field, though. And there's a legal minimum you must pay teens working in summer internships, because they're not unionized and often get lowballed.
UBI without a minimum wage promote workplaces that don't respect worker's labour, and socializes while privatizing profits. It would basically be the issue Germany had with social support before minimum wage was introduced. We need both UBI and a minimum wage.
Why should the majority of people settle for the leftover scraps of the capitalist class? I do see that it is possible for UBI to exist within a system where the means of production is under public ownership and democratic control, which I believe is necessary for social justice. However, if UBI is ever implemented in a fundamentally capitalist society, it only means that the wealth disparity has grown so large that the capitalists, in the act of preserving their heads on their necks, allow for a crappy standard of living for the rest. Although I could see myself welcoming UBI for a multitude of reasons, I am also scared that it would entail some form of permanent class disparity with the majority of people forever impoverished.
That's why the developed world is taking about universal basic income and not minimum wage. Guess the US will get there at some point too. If they stop falling back into the dark ages at some point.