Earlier quoted context omitted.
MV = PQ. Money * Velocity = Price level * Quantity of goods and services. Friedman assumes the velocity of money is constant (good assumption), so really the only why you can cause inflation is to increase the supply of money, M. UBI increases the velocity of money by moving money from low-consumption, high-investment rich people to high-consumption, low-investment poor-to-middle-class people. Increase money velocity…
But if we are demand constrained as opposed to supply constrained for most consumer goods, than you will see an increase in 'Q', not 'P'.
Distance is effort, both in energy and time.
Space is already constrained by historical distributional of 'valuable' lands, and restrictions on new ones. There's nowhere left to go out and just settle that someone else doesn't already claim somehow. (Yes, if you go out of the solar system you might claim that... but that's literally how bad the issue is.)
The real solution is increasing supply. Yes, UBI will help individuals, but society must actively balance to ensure that there is enough supply in the markets to maintain liquidity. Otherwise (as we see with housing) flow seizes and prices dramatically rise.