On point 1 I heard the argument made that in the past the aristocracy were never gainfully employed, they just spent their time reading or philosophising or being artists or hunting or whatever. So it would be a bit like that.
On point 2, in theory it pays for itself because by putting money into peoples pockets it stimulates demand, increasing economic activity and therefore taxes. Also a lot of benefits are already handed out already and UBI would not be in addition to that, but rather replace it. Which also touches on the fairness issue: this way it isnt just the feckless, undeserving poor that get handouts, but everyone else as well.
I think the issue is like George said, there is a huge problem coming over the horizon, maybe UBI isnt the best solution to it but it is at least an idea that addresses the problem, I havent heard too many others challenging it on that front.
1. And how many people slaved away for those nobles and aristocrats? It's not like their wealth fell from the sky. They essentially had an easy life on the back of a lot of people who had to provide for them.
2. Yes, it stimulates demand. And what does an increase of demand do by same (or potentially even smaller supply since many people decide not to work anymore)? It raises the price. Quite potentially nullifying the effect. And I am also against many of those benefits and I think the entire welfare should be decreased, because people need an incentive, have competition and have a stake to be productive. There is quite a bit of psychological literature on the matter. So I neither think this functions economically nor do I think this functions with human psychology. It is a dysfunctional system.
And if it would function in a world where everything is done by technology I am critical as well. For once the people who can create and maintain these machines are the new aristocrats and essentially can blackmail the rest of the population - so you either slave away nonetheless or are just on your own, because they keep these machines mostly to themselves since they do not need human workers anymore. Secondly it is also a question of ressources. Modern technology requires a shit ton of natural ressources. Silver for example is anticipated to have to be used A LOT more in the next decade or two (So go buy silver right now. Seriously.). But we only have a finite number of ressources. It might simply be impossible with the current population in the world. It might work in Europe or North American, but the billions and increasing population in Africa or Asia? Possibly not.
3. Until technology takes over (if it does) it takes at least a few more decades. The discussion is about implementing UBI right now. That doesn't exactly play out.
1. You don't seem to understand the magnitude of changes to come thanks to machines and AI. Don't think in 10 years time, think in 100 years time. There will be no point in humans working because they are inefficient and expensive. There will be no jobs for the big majority of the population, fact.
2. Yes, there would still be a upper caste, and they will have a choice. Share the wealth created by the machines, or build walls and create a dystopian future. It's their choice. Hopefully before the machine owners gets to choose, world's governments united, will decide to "earthalize" the productive resources so it can be shared properly.
3. So it's the same as today. When the "invisible hand" works in shady mysterious ways, regulation will be applied if needed.
1. Good notion. Instantly assuming I don't understand the magnitute. I do understand it, but for once I am critical. And secondly it doesn't explain why we need UBI right now, if technology will do these taskes in several decades. That doesn't play out AT ALL. Secondly it might not even be feasible to have everything technologised, because we have finite ressources (see this post in my reply to the quote above yours).
2. "Hopefully worlds governments united". Yeah, I'm sure that will ever happen. Not. Human psychology is in the way. We are still operating in tribes and just a few decades of technological advancements will not delete that natural programming in ours. People do prefer their kinship, people do work to benefit themselves and their kinship (especially their own family). There is absolutely no way all governments will ever come together and unite. I would bet everything I have on this one. But even if there is a slight chance - do you really want to rely your entire views and hope on this low-chance scenario? Or you want to approach this realistically?
3. They will not require regulations anymore, if they control those elements. There is a reason why Nestle is trying for years to make water be ownable. Where there is power, people want more power. And if they don't, someone else will come and take their position to apply that power. If they have those machines (which is still in question that they ever will) - what's the chance of sharing? Why would they NEED regulations if they could just say "well, we will not give you any goods". Because they do not need to anymore. Right now, companies DO need workers and there is an exchange between labor. But once they have that supposed technology that does all the work humans can, they will not require that exchange anymore. And UBI surely will not help it, because there is no one paying for it.