[jltsiren]

This was about the basic income aspects of UBI, which are orthogonal to the decision who is entitled to the benefits.

What you are suggesting is already done, and it's exactly what's wrong with the current system. When there are multiple separate low-income benefits, it's easy to accidentally create incentives against working. You try to work harder, but you lose 80% or 110% of the additional income to taxes and lost benefits. The latter because you cross one or more thresholds for the benefits.

Basic income avoids this with better coordination. There are no income thresholds for "low-income" benefits and no lower tax brackets for low to medium incomes. Everyone receives benefits in some technical sense, but most people pay them back through higher nominal taxes. In practice, most people would not receive basic income and would not pay any higher taxes. They would just do their tax calculations in a different way.