Well, UBI will probably eliminate poverty for some definition of "poverty", and not for the new one which will appear soon afterwards. Some people will keep updating the definition to mean "below the (new) average".
But if we taboo the word, we can hope that UBI will remove e.g. starvation. And it will be done without having to employ a greater army of bureaucrats. Maybe the money saved on the unnecessary paperwork will be a significant fraction of the costs for removing starvation.
So if you give me a budget and ask me whether I would rather spend it paying people to create and process unnecessary paperwork or feeding people who starve, I guess the answer is obvious for most people, regardless of their other political opinions.
(Okay, some people would call it a false dilemma, and say we should neither feed the hungry nor pay the bureaucrats, but use the money in some other way; maybe not even collect it. But when you take into account the mainstream opinion, and what choices are realistic, this one is an obvious improvement. Well, depending on technical details, of course.)
we can hope that UBI will remove e.g. starvation
There is no starvation in Western countries.
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