The more I think about it the more the UBI system starts to makes sense. Essentially I think taxing the ultra rich could redistribute wealth to the rest of society which would give them more buying power to stimulate the economy. Those that don't want to work can live on a minimum UBI monthly check but they wouldn't be living great which gives them incentive to look for a job so that they can raise their living standards. Even a McDonald's job could taken by someone looking to earn extra cash for whatever goal they have, probably wages would have to rise a bit so encourage people to go work there instead of just living on UBI but that's in general a good thing.