> A much better measure is something like...

Yes. Focus on outcomes.

Pick a target amount of inequity. Act to hit that goal. Adjust as needed.

For example, I advocate restoring our gini coefficient from the current 0.48 (?) back to 1970s era 0.35. People smarter than me will figure out how to best measure inequity, ideal targets, and implementation details.

Arguing about all the misc tax rates, purposefully ignoring the macro, is an obfuscation strategy to prevent taking any action at all. Straight out of the CIA's field guide on sabotage.