The one thing I learned through my life(and I am not even that old), monry should be proportional to your intelligence. When the Soviet Union collapsed(I was just a small kid then), a lot of people bought state owned companies, made a lot of money by taking the advantage of thr devalued currency etc. Well, while a lot of people turned out rich from it, only a few kept their enormous wealth.
Same with UBI, if people somehow were to get so much money(let's ignore the fact that it is basically impossible to implement), most of them would probably just becomes drunks. Which might actually be good for some people - conpletely dumbed down population that is reliant on the government.