There have been trials in Western countries. Ontario, Canada ran a basic income trial that was stunningly successful until a Conservative government came in and shut it down.
My favourite bit of data from that trial was that employment actually went up, not down. More people were working once they started just giving people money. The only exceptions were amongst mothers of newborn children, and students (y’know, people who have much better things to be doing than working).
Sadly it was only one town, but the results we got before it was shuttered absolutely proved that the concept worked.