UBI is great for the "third sector"
The so-called third sector would be the big winners.
Currently, doing charity work can lose you your JSL.
With UBI, you could afford to choose to do voluntary work, much of which would be supporting our over-stretched public services.
Society as a whole could be much better off under UBI.
Even being a representative for your neighbours in your local council or the House of Commons could be a voluntary role without lack of wealth being a bar to entry.