What's your point? Their point was that these scales can help provide evidence of minorities and women getting paid less. Can you expand on what we could learn from the situation of two people getting different salaries when they're neither minorities nor women?
My point was that singling out minorities or women is not necessary, it applies to all humans. Although I think what you end up is a mediocre salary for everyone, not just those who negotiate poorly. By setting the salary range tightly it prevents market forces from affecting pay much.
Unfortunately, grouping people is the only way to enforce these laws in the US. You have to prove you were discriminated against because you are part of some protected group.
