Sounds like a great idea, and in fact if AI proceeds as it looks to be proceeding, Basic Income will be the only thing that keeps society from totally collapsing.

The tricky part is trying to figure out how much it should be. If such a thing would be implemented like totally in a society, it would probably have a huge economical impact. And as far as I can tell, nobody has any idea what that impact would be. Who knows, perhaps it’ll be completely nullified by prices rising exactly as much as the UBI is.