[lend000]

Assuming taxes rise proportionally to cover the bill, there should be no inflation -- in fact, it would even have a slight deflationary effect (all other economic factors being equal) due to deadweight loss.

Whether the nation is wealthy enough to sustain that tax load yet is uncertain. Market caps and national wealth values on paper break down when huge amounts of wealth needs to be liquidated to service new taxes. Even so, I think it probably is, with a clean restructuring of our tax brackets, but we have a lot of other debt to service first. Of course, in reality, if this ever gets legislated it will only be adding to the already staggering deficit.

Whether or not the politicians whose voter bases rely on UBI can be trusted to keep the UBI at a reasonable level (i.e. enough to survive in rural areas but not going to cut it if you want to live in west Los Angeles and not have a job), is a more contentious point to me.