[mc32]

I believe many of these UBI experiments were also advocated by different billionaires. One idealistic group and one pessimistic group.

Communism is one big UBI. Everyone has something to do and everyone gets paid enough to buy basic goods and services even if sometimes some good and services become scarce. Communism proved it works, but it's not efficient. It means you have to choose between a somewhat stagnant society and a progressive society (not progressive in the political but rather technological sense).

For some this would be good. But for others not. Moreover, the government can dictate what it wants from you since you are beholden to it and don't have much mobility.