I think this discussion rather gets to the bottom of the objection to UBI: nobody objects quite so strenuously to wasted work as they do to "idleness". In the view of these people, it is morally superior to pay people to dig holes and fill them up, or the white collar equivalent of digging holes in spreadsheets and filling them up again, than it is to just give them money with no strings attached.

The important thing is that people are prevented from enjoying themselves for at least eight hours a day.