If you make the "basic pod" a tent, wealthy countries could probably afford this sci-fi future today. But "enough money to live like a homeless person without having to beg or steal" doesn't sound so great as an aspirational goal, does it?
If the "basic pod" is supposed to be something more durable, probably the first step would have to be building enough homeless shelters for all the UBI recipients without another source of income.
Yes, I'm saying that wealthy countries can definitely afford the "basic food" part of the "live in your basic pod and eat basic food" future, but the "basic pods" are more uncertain. If there's not enough money to build enough homeless shelters to house everyone, how could there be enough money to pay for UBI high enough that everyone can afford a roof over their head?
Wealthy countries could afford this even with proper housing, food etc (not fancy, but not tent/slop either). Even not so wealthy ones could afford something. You have to go back all the way to hunter/gatherer societies to have a situation where each person's productive labor only generates enough wealth to feed themselves. In any modern industrial society, the productivity is long past the point where each person produces enough to satisfy multiple people's needs, in aggregate. The only problem is that most of this generated wealth is then directed to satisfy the whims of the very few people at the top who get to collect economic rent from the rest of us.
>If you make the "basic pod" a tent, wealthy countries could probably afford this sci-fi future today.
Don't you also need food?