Right this is what the UBI folks don't see to get. I plays out in one of two ways.
1) You still end up with a large group of disaffected people who are unhappy with their lot in life because they have nothing to do but watch TV all day and see fancy people doing fancy thing they don't get income to support and have no path to get there. Hard work won't help them, there are no jobs left suitable for their talents. They get their check and their soviet style block apartment and that is their life and all their is to it. Humans even those who are not in on the leading portion of out intellectual bell curve won't be satisfied living that way. People *need* goals, they have to have some hope of improvement, and for most people that is improvement with respect to their peers, not "I feel good about myself because I sat and read all the classics" and not "I made this art for me, and I don't care if everyone else just sees it as garbage." some people are like that but the vast majority are not so self actualized.
2) We literally destroy the planet! Robotic workforce with unlimited cheap labor or not other resources remain limited. You will have the people on basic income asking why they should not get a bigger house, a faster car, travel to the other-side the world at super sonic speeds. After determining that there exists no path to earning these things, they will declare them to be entitlements. "Its not fair I was not born a winner of the genetic lottery, who can still find work in an automated world" and to some extent, I might be inclined to agree if man made economics as you say severs to cut them off from the things others have rather than provide any path to getting them. Earth can't sustain 9Billion people each living the life style of the say top 30% of what is considered middle class in the United States enjoy. There isn't probably enough land to build that many suburban houses and while a lot of people like and will choose cities enough will want their own little private patch of ground to lay out in the sun shine on. It just won't work.
Technology has always and will always allow more of us to have more, but physics will never allow all of us to have everything. No economic policy can change human nature. Either the population rebels against it, or if you look at say Chinese or Soviet communism human nature is corrosive of it until it starts to look like sadder, capricious, lawless forms of capitalism or fascism.