How on Earth would I provide numbers when we're not talking specific proposals?
We currently cannot afford a universal basic income that allows people to not work. But eventually, we will. That's why it needs to scale with a tax on profits.
"People don't need to work" is the target number. Pick a number. Set a minimum quality of life, and allow as many people to drift there as would choose to. We can set that as a real target, even though obviously the nominal target would shift over time.
Sure we can. What we can't afford is to keep people involuntarily unemployed in the name of fighting inflation.
You felt confident enough to make a base claim. Then you replied with theory.
Some factors: UBI data that doesn't have an expiry date (nearly everyone will behave differently if they have $17k for the next two years only vs. $17k for every year in perpetuity); ideas: lottery winners, early retirement takers, people on cyclical EI, people who inherit large amounts of money, people receiving generous alimony. There's also the mechanism whereby inflation is countered so that $17k today gets the same (equivalent) income next year, not super-easy to actually implement, but easy enough to model.
Seriously, you can only tax consumption in the end. There will obviously be some beneficial distortionary effects on consumption (well, except that the US is over consuming my share of the natural capital), but the benefit of our current price system is that the net consumption of the labourer+capital owner will be (in aggregate) less than the economic surplus caused by the relationship, especially since most (rich) capital owners use a portion of the producer surplus to merely shift ownership of an existing asset (i.e., savings).
You're proposing that net production will rise to compensate both the increased consumption AND the drop-off in labour participation. Unlikely. Too many people fail the marshmallow test.
Finally, does your UBI proposal scale with social wealth? Or is Mr X-Box stuck with an X-Box even as holodecks come online?
When we socialist millennials take over the government, we will show you by demonstration. I find the idea that we cannot "afford" a UBI to be patently ridiculous. The US is the "richest country in the history of the countries, in the history of riches."
I never said that the US couldn't afford one (though Warpus and I are Canadian, but ehn, productivity is close enough). I said that we couldn't afford one sufficiently generous that would allow people to not work. Obviously, designed correctly, we will someday. As long as it properly scales to sustainable growth.