That's not actually true - if you look around, you'll find a surprising number of people who are right-wing economically overall, but specifically support UBI; and this is especially popular in tech circles, which, if it really goes as OP described, would be the ones amassing power. Two simple reasons: first, when suffering is too obvious and blatant, it's harder to not notice it; and second, you can only push people too far before they riot, and it's cheaper to pay them just enough to avoid that.

The question, rather, will be: what kind of UBI - "just enough to prevent large-scale unrest", or "as much as we as a society can afford"? The former is not necessarily an utopia or even close to it; think The Diamond Age and The Expanse.