Do you believe people will be able to sustain their incomes at current levels if A.I. does most of the work? Maybe by some magical means they will, but I'm far from sure that the majority will be able to stay above the poverty line.
Keeping them running and patching the minimum of damage with a UBI is just absurd. If the impact on the job market is as bad as what the AI leaders say, which is extremely bad, it’s a national security risk level for pretty much all developed economies. We would absolutely never accept that in any other domain
If you believe politicians will be able to regulate companies with such financial clout you're living in a fairy tale. These companies will be able to hold the U.S. government hostage.
Does not matter, UBI will make the situation worse.
And that "AI does most the work" is yet another fairytale. AI does the easy work, leaving only the much more difficult and the controversial work, exactly the work nobody wants to do, due to the responsibility attached. So, AI will do that, and AI will do that with a preference for the wealth class.