The lowest tax bracket in the USA is $9k. That is below the poverty line in the USA at $12k for one person. Most people max out $9k. Even poor people. The ric

The lowest tax bracket in the USA is $9k. That is below the poverty line in the USA at $12k for one person. Most people max out $9k. Even poor people. The rich will never benefit more from a tax cut there than the poor. Where they do benefit is when you, say, lower every bracket by 2%. But that is fundamentally different from your proposition.