The proponents of UBI, I'm not one, seem to believe that the money can be found by:
- Eliminating all existing forms of social security. In fact this is a major reason often stated for UBI: it "simplifies" the rules to the point that you don't even need people overseeing it. Which leads us to:
- Reduced overhead. Apparently they believe that several trillions are currently being spent on "overhead".
- And finally, of course you'd be able to tax all those people since they now have income.
So in the end, you take away money from the people who actually need it, spread it over a far larger group including a great many people who do NOT need it, thus leaving everyone in the first group with far too little to live on. And what little you get, you need to return in the form of taxes in order to pay for the whole scheme.
Then they point at "succesful" trials, without mentioning that no single trial was so succesful that it was continued to this day, and without mentioning that all of those trials relied on money being poured in from outside.
We haven't even begun to discuss what such a scheme would do to society as a whole - if you pay people to do nothing, is there going to be any kind of progress? Will there be anyone left for the less pleasant, but nonetheless necessary jobs? Or hell, for any kind of work? Will it be acceptable for foreigners to enter the country and receive UBI, or will a 'wall' be necessary?