As I mentioned before, the UBI has been kind of a bugbear of mine lately, because such an obviously silly idea idea is getting so much traction. Firstly, let's all be honest about one thing: it will boil down to "the new welfare", because in practice, since the UBI will be paid for out of taxes, there will be two categories of people:
-people who are net gainers, receiving more than they pay out (the unemployed, underemployed, sporadically employed, very-low-wage workers)
-people who are net losers, paying out more than they take in (everybody else)
Proponents love to say "both left and right find things to love about UBI!" but both left and right will find things to hate about it too. The right will hate the fact that the unemployed will have the option to spend all their money on drugs and porn. And a certain percentage will do this, obviously; just look at San Francisco and Vancouver BC. The left will hate the fact that parents will be able to spend all their UBI at the casino, leaving little Susie and Johnny still without food and clothes.
This last bit is why, as people have mentioned, it is never going to replace all other forms of welfare payments. That is a complete pipe dream. So in practice, the only thing we're likely to end up with is UBI and free daycare and free school lunches and socialized medicine and rent assistance, etc.
"Millennials are lazy. They'd rather have avocado toast than cave in a man's skull with a tire iron!" -FFF