Since the distribution is exponential, removing the top tax bracket and raising the rest a little would be revenue neutral, but exacerbate wealth inequality. Not arguing if thats fair or not, just that you can make policies revenue neutral while still favoring the ultra wealthy.

It would exacerbate income inequality. It would favor higher-wage workers.

Income and income taxes are irrelevant to the wealthy. Changes in wealth inequality are mostly changes in asset prices.

Except the Reagan cuts lowered taxes on the bottom 80%, and the top saw a small increase. See my other post with historical effective tax rates from the CBO.