Always found it something, how wealthy "philanthropic" types seem to gravitate toward doing their "nice stuff" in such a way as to promote increases in 3rd-World population. IMO, they see things as a tug-o-war between 1st-World ideas and 3rd-World ones (accurately, I'd say) and you can see which side they're rooting for.
In the end, they are absolutely NOT on the side of the common human-being. But of course, Monsieur, they will continue to take all things at once by flying their "I'm a Philanthropist!!!" flag.
The main idea behind UBI, though, is that simple reality says most of us will be "unneeded" soon enough. The percentage required to "keep us running" will continue to shrink, and a very high percentage of humans will be dead weight in a practical sense.
Though, IMO, if you're concerned that you'll be one of the remaining few "paying" for everyone else (since we know Gbers are irreplaceable in any environment), you can relax. The place will get will get turned on its head long before any widespread UBI happens. We'd have seen serious attempts at population-settling, and from long ago, otherwise. The fact is that we've seen the opposite, which most certainly can't be viewed as a good sign.