It is not impossible to think that many people will just be served an UBI and don't expect much more in life, after all, if we have AI+Family+Housing+Food (assuming gov robots would take care of providing us free food in some form), I bet millions of people would be contented with it.
PS: I include AI as an important one in the future because it will be a direct way to get educated and replace college for example without having to pay (or very cheap).
You’ve addressed a different question, which is how satisfied with life will people be post scarcity. That’s a fine conversation to have, but it’s not the one I was having. My point is: how do we get there?
Seeing as how austerity governments campaigned on reducing social benefits and achieved considerable success over the past few decades, I don't see how your solution consisting of granting people even more social benefits will ever happen. Unless there law and order is about to break down, there is no reason for the rich to leave all of that money "on the table".
PS: I include AI as an important one in the future because it will be a direct way to get educated and replace college for example without having to pay (or very cheap).