People wonder "where is the money going to come from?" On a national level it could be newly issued fiat currency, which silences the "it's theft!" argument but then raises the crucial question: what about inflation?
Well, there are two issues here:
1) If the people are freed up to learn or take jobs (I wish minimum wage would be abolished in any jurisdiction that UBI is given out) then more dollars would be chasing more goods and services, so no inflation.
2) However, if there will be more money chasing the SAME number of goods and services, we would have to remove the money from the system by taxing corporations. And this is, in fact, something that raises questions of liberty (of corporations). Corporations can choose where to operate and they often choose tax havens.
What we should really be doing is recognizing the incredible changes that are coming because of AI and its effects on automation in the next 20-30 years. Demand for human labor will fall and experience massive shocks. Wealth creation will increasingly be done by ROBOTS.
This is a GOOD THING as it breaks countries' historic dependency on social security schemes working from having more and more children pay for the elderly. That leads to overpopulation and kicks the can down the road to the children.
Instead, we want to TAX THE MACHINES by somehow measuring the productivity gains from laying people off. Not enough to disincentivize R&D but enough to scale with the UBI and remove money from the system. The machines don't really need to keep ALL the money and the argument that "taxation is theft" starts to sound silly when you are taxing profits of corporations run largely by machines.
The other way, of course, is to redistribute the money to shareholders in the public stock market via dividends. This has been the "socialism" we've had so far in this country.