However, I would argue that the level of skill of any individual employee is made irrelevant inside big companies.
If Google pays 3X salary to get the best designer in the industry, it's completely wasted, because this person will be hamstrung by the much more powerful forces of bureaucracy and design debt.
If you place that same person high enough up in the org chart that they have power to make decisions...then they can't design anything amazing because they're just another manager attending meetings all day and not designing.
It's a catch-22. Hence why companies commoditize labor into pay bands.
You might as well just hire modestly above-average people at modestly above-average salaries who are easy-going and get along with their peers without drama. This is basically what most company interview processes are optimized for.