> The only problem is spending money on external goods which can be managed by taxing imports.
But you need the import (of money, specifically) to run the city for the people who live there on UBI. I don't believe that UBI will ever be self-sustaining, but I'd love to see an experiment that tries to prove me wrong. For now, they're all like "free energy machines" that are plugged into a wall socket: outside funding paying for the UBI. But that doesn't help, because you need self-sustainability, or you'll need an external work-force slaving away for your luxury not to work. And I'm pretty sure that external work-force won't be too happy about that.
But you need the import (of money, specifically) to run the city for the people who live there on UBI. I don't believe that UBI will ever be self-sustaining, but I'd love to see an experiment that tries to prove me wrong. For now, they're all like "free energy machines" that are plugged into a wall socket: outside funding paying for the UBI. But that doesn't help, because you need self-sustainability, or you'll need an external work-force slaving away for your luxury not to work. And I'm pretty sure that external work-force won't be too happy about that.