How? Using which political, economic, and financial tools? And what will be the side effects of those policies? That's exactly the point I was making: UBI proponents assume a downright utopian best-case scenario where everything works as planned (even though those plans are vague at best, and wishful fantasies at worst), and politicians and voters behave perfectly rational.
There's a simple answer for that: please look at communist Poland 1980-1989 - trying to counter raising prices with government intervention leads to supply crisis (since production is not economically viable anymore). Imagine all stores having nothing to sell, literally empty shelves, forcing common people to fight for scrapes.
Ein Mann geht in ein Kaufhaus in der DDR. Er fragt den Verkäufer: "Gibt's hier keine Socken?" – "Nein, hier gibt's keine Hosen. Keine Socken gibt's in der zweiten Etage."
Translated (roughly): A man visits a department store in East Germany. He asks the shop assistant: "Do you have no socks here?" – "No, we have no trousers. No socks are on the second floor."
(The joke relies on the word order of German syntax; properly translated, the dialog would be:
"Don't you have any socks?" – "No, we don't have any trousers. No socks are on the second floor"
But then the joke doesn't really make sense anymore.)
When we control oil prices by using reserves and trading agreements, does that cause people to fight for scraps?
How about when we subsidize silicon chip manufacturing? Did that collapse society?
You cannot, in a serious conversation, compare Soviet Union economic policies to modern socialist ideas. It's just silly.
"Modern socialist ideas" are basically the same ideas that were already tried in Soviet Union, just dressed in fancier words.
Otherwise I could say "erasing money would make us live like aristocrats" without explaining how or why, and you should try to figure out why I could think that way, what kind of tools and mechanisms I thought of and after that, explaining why it would not work. Obviously, I could say those are not the right tools for my idea, so you have no real counter arguments, yada yada yada...
And as a proponent of UBI, YOU should explain how it would work, not the others. What financial tools or mechanisms would use a government to control the inflation or the rise in prices? I mean, even in the late Soviet Union had to look at capitalists countries to have an idea of the prices for basic products, because they coul not put a price that would make it work.
> Prices rise due to increased consumer spending capability, to the point where you have to work again to get above the poverty line.
Governments will respond to economic factors that diminish purchasing power in order to maintain the effectiveness of UBI, as a part of UBI.
> Any realistic UBI is too low for people with special needs
Diminished support for disabled or sick people is not a part of UBI. UBI should become a part (within or on top of) of their support. Bureaucracy will still be diminished for non-disabled people.
> If the UBI is independent of local cost-of-living, it'll most likely be too low to survive on it in high COL areas
So people in those areas will have to have jobs. UBI still allows them to go quit their job and move out to the country if they want to subsist on it. UBI would go nicely paired with rent controls and maintaining individual purchase power, but it doesn't even need those things to be a net positive.
UBI should have been implemented 20-40 years ago, it will surely be necessary going forward, it's time to get on board.