This is actually the whole point of UBI, to keep things simple without having to agree on cutoffs or tapering strategies. Your UBI "refund" is a constant amoun

This is actually the whole point of UBI, to keep things simple without having to agree on cutoffs or tapering strategies. Your UBI "refund" is a constant amount but the taxes you pay increases with income, so the proportion of your taxes that you get back from the government tends to zero as you make more money. It might help to think of it as tax credit that every citizen receives. The credit barely puts a dent in the taxes paid by the 1%.