No, people always want more money.

Why do so many rich people who could afford to retire work hard to make more? Why does hardly anyone on a high hourly rate work the minimum hours they need for an adequate income?

There have been numerous trials of UBI and I have yet to heard of one that showed people worked significantly less when given it.

I kind of figure people will work on things that don't really need doing like putting on music festivals etc. while the robots will do the essential work like grow food and take out the trash. Maybe I'm being optimistic. Although I have lived places where things worked a bit like that like when I was in South Africa a while ago with the blacks doing the less desirable jobs usually. So maybe like that but with robots?

my only problem with it is "give everyone 1400/mo and suddenly prices will rise by an effective rate of 1400/mo". I don't see any argument to counter that. I want it to work though.

The only way I could see it working is having a 2nd currency, comparable to SNAP benefits or housing vouchers, that is independent of the dollar (and not stigmatized either). Then let the dollar value of rents and food fluctuate as they may, but require that the UBI currency is accepted for some fraction of housing and food (and the minimum housing is sufficient to be covered 100% by UBI). Then cover the spread through taxing the corporations who wish to do business in that state. If the greedy Private-Equity owned corporation wants to jack up the rent, they can get their UBI tax jacked up also. If they want to quit the state, they can sell their assets to a local resident who wants to build a small business being a property manager.

No, I do not think it will have as strong an inflationary effect as that because the money would come from increasing tax or reducing other expenditure so the net amount the government is injecting into the economy (less what it takes out by way of tax) would not change.

if you can convince the people to vote for higher taxes paid by corporations or ultra-wealthy, I'm all for it.

AI makes more stuff keeping price/stuff down.