We have those, and the administration and oversight to nitpick every penny sucks a ton of money out of the funding pool to make sure it goes to the ‘right people’ for the ‘right things’. UBI reduces the overhead to just making sure everyone gets it until they die.

People will spend money on necessary things because they are necessary. We can easily assume that their UBI is being spent appropriately, because doing so is necessary before taking into account any other income they might have.