But that seems not unreasonable on its own. Tipping a friend $20 because he helped carrying boxes when you moved as compared to hiring a professional mover for

But that seems not unreasonable on its own. Tipping a friend $20 because he helped carrying boxes when you moved as compared to hiring a professional mover for $20 seems like a valid difference to me. But you a right that this could maybe be turned into a good argument for an universal basic income because you may be able to sidestep some otherwise relatively difficult to solve gray area issues, but I am not sure, I haven't thought that through.