I admit this sounds utopian, but the problem I have with such set-ups is they remind me of perpetual-motion machines.
Even this humble level of safety net that you propose is incredibly expensive. Who does the hard work of building the small apartments? Who comes out and works on the plumbing when it clogs? And who picks up the trash every week and takes it to the dump? Who runs the water plant, the electrical plant, and who runs the fiber out for even the free, slow tier of internet? Who makes the base model of phone or laptop that everyone would be entitled to? Who tends the robots at the automated farm? Who polices the buildings and neighborhoods full of all these otherwise-indisposed inhabitants? Who provides medical care?
Answer: The Government. The Government offers decent pay for all these dirty jobs, to keep these resources available even to those who pay nothing. Where does the Government get the money to pay all these people? Answer: Taxes. Taxes on whom? It can't be taxes on the general populace, because they don't have any money, which is why you propose these things be free. So it must be taxes on the upper tiers, people who are working more than the baseline. They could settle for the free stuff, but they choose to work to earn more and get more.
But my objections are twofold.
1. It just doesn't seem fair. All these people that are rich and supposedly could share their wealth with the rest of us, like Larry Page and Sergey Brin, who are billionaires, they didn't have to do the things that made them rich. They chose to work at the things that made them so. If instead they chose not to do those things, then they wouldn't be billionaires, and that would be two fewer people you could tax the dickens out of.
2. It just doesn't seem like it will all add up in the end, at least not forever. Even though there are lots of rich people, I don't think there are enough rich people to keep society going forever off their taxes. First of all you would have to tax them so hard that it would be demoralizing to them. And it would be demoralizing to others who also would consider doing something to become rich.
A dream I have that might work is that every able-bodied person is required to work, but the standard work week is halved. If I only had to work 20 hours a week at my day job, I would be ecstatic, and I think I would have enough time for my hobbies, art, open-source contributions, and other things that people are talking about benefit the rest of society, if only people were given a breath to work on them.
I still think 40 hours a week is pretty hard, especially when you consider that people who work only 40 hours a week don't work only 40 hours a week. Add in commutes, runs to the grocery store, chores, home repairs, and other the other work you must do, unpaid, it adds up easily to 50% more. And I have not even mentioned parenting.
If people could live comfortably working 10-20 hours at an official job (not counting the other work I mentioned), that would be paradise. I don't think I would even want to work 0 hours a week. I would start to go stir-crazy.