I think the idea is for a portion already receiving assistance, UBI could replace that assistance. I think part of his plan would be that the safety net would be replaced with the $1000 guaranteed income over time, saving in administrative costs. Milton Friedman supported this kind of welfare. The other potential criticism, which he discusses, is you would have really wealthy people also opting into UBI because he doesn't want a free $1000. His plan, as designed, is kind of regressive in that way. I think that's justified by the universal principle of the idea. It's guaranteed to everyone, because you're a citizen of the US. It's your dividend for being part of our society.
I'm not saying his idea is perfect, but I like that he at least has some foresight with his policy priorities. Even if you believe the economy will eventually adapt to replace the jobs lost through automatization, it's not going to happen over night or in many's lifetimes. And a large segment of workers will never be able to transition. A 55 year old truck driver with a high school degree or GED is not going to go back to school to become a coder to program the self-driving truck. It's just not going to happen. His son or daughter might, but he won't. What do you in the mean time? This is what happened with manufacturing and coal, and instead of thought-out policy to address it, we got opioids and Trump. Yang offers UBI as a solution to soften the transition during this next transformation and avoid the same pitfalls.