At what point would AI necessitate UBI? I'm assuming your idea here is, roughly speaking, that at some point, AI will displace a large section of the work force, rendering them homeless and unable to feed themselves, and that to prevent this, UBI would become necessary. But don't we already have homeless folks? Haven't we already been through technological revolutions putting people out on the streets? If this historical precedent is anything to go by, the politically dominant class is perfectly content with people going homeless on account of not being able to find a job. Seems to me that the classical solutions of pumping drugs into the streets, immobilizing the downtrodden, and straight up slavery through the prison system, are much more likely to happen than UBI