I would have phrased it differently, namely that people at the bottom of the economic ladder lack the education to wisely spend UBI and it will end up getting wasted or siphoned by predators. I've worked closely with poor people in my church, helping them learn to budget and such, and what I've found is that more often than not, they had hundreds of dollars each month tied up in services they didn't use, many of them very deceptive and predatory (i.e. the letter has red ink "amount due" stamped on it, even though it wasn't even a bill!)