...and how do you stop companies from hiking prices to absorb it?
But if people could decouple income from location, people could move to cheaper housing. There are free houses in Detroit and Baltimore because there are no jobs and that area sucks. In a UBI-topia, people would leave Sf and move to Baltimore.
That just brings another problem. You will have two kind of countries: some with BI and some without BI. How are you going to convince the people from the countries without BI not to move to a country with BI?