Where can you live that life without being an outcast? People in need get Basic Income, but it is not Universal. You have to trick the system if you want to get it indefinitely.
>As far as I understand, the point of UBI is to go beyond that because these basics are seen as limiting.
Of course they are limiting. That's why UBI works. As you have analysed correctly, you would have to enslave other people if you want more.
Thus, people don't stop working, because there is always something that isn't covered by UBI.
>Primarily, they stop working. We already have too many who are quite alright with the welfare they receive and prefer not to work. I really don't want to expand the number, because it just increases the work load for the rest.
Don't forget that you need people to decide who is eligible for welfare and who isn't. In an UBI society, those people could do something else and reduce the work load for everybody else. Basic resources are cheap and get cheaper with more automation. At one point, you will be able feed the entire world from the work of a few persons.