Oh, I have. The most eye opening part was realizing all of the host of variables which were factored into wage negotiations which had nothing to do with how good the employee was, including:

* The irrational biases of other companies (even if we didn't care about you being a university grad, our commensurately lower wage offering reflected the fact that other companies did).

* If the employee telegraphed an air of needing the job (e.g. people with a debts), they got offered commensurately less.

It's an ugly process, truth be told.