a UBI would be cheaper and more effective than what we do now, economically. If you take the total amount we spend on anti-poverty programs and divide by the number of poor people, there should be no poor people!
Poor people aren’t lazy, they’re trapped in the current system. A UBI is not contingent on staying poor, so it would both lift people out of poverty and flatten out the benefits cliff. Of course, this means that the new UBI would be instead of existing programs, rather than a supplement, and not everyone agrees with that.
Finally, there is crude "realpolitik." Plenty of very wealthy people already live in the US, and the new economy is likely to create inequality on steroids. In a democracy, the poor and middle class have many tools to “negotiate” redistribution at gunpoint.
So who is going to pay for this ?
Switzerland did a study on this before they voted on it. It was defeated.
Their calculations were that if they eliminated all social programs, they would actually save money with Universal Income. I don't know much about them, but I'm assuming we have more social programs than they do.
We would still pay the same amount of tax, but it wouldn't be so categorized. In other words, no welfare, no SCHIP's, no Medicare or Medicaid, no Social Security, no HUD, nothing. All the money would be converted for Universal Income instead.
I believe the figure they used was similar to 18K US dollars for each adult citizen.