Do you pay orders of magnitude differently for the order of magnitude difference in performance? If so, the salary range that you publish for a role will simply get wider.

I think this will turn into a trivial game: every offered job positon will have a comp range of $1 to $1mm annually and between 0 and 5mm RSUs. And sold as pay equity.

Knowing who the overpaid slackers in an org are will help adjust the culture.