This is an interesting study on two radically different approaches:

[Link: businessinsider.com]

Google on the other hand not only exercises their own version of "pay inequality", they openly embrace it as part of their competitive culture:

"It's hard work to have pay ranges where someone can make two or even 10 times more than someone else," he writes. "But it's much harder to watch your highest-potential and best people walk out the door. It makes you wonder which companies are really paying unfairly: the ones where the best people make far more than average, or the ones where everyone is paid the same."

Not sure who's right or wrong---but ill be watching attentively.