In any case, we're not talking about something irrefutable, like a law of physics. Income inequality has been on the rise in the US since the 70's and is, possibly, one of the causes contributing to the shrinking of the middle class.[0]
I am not advocating that anyone gets anything for free, rather that the majority of the employed receive equitable pay. The current distribution, were a nearly obscene amount is squeezed towards the top of the organization, is unsustainable and, I would argue, unhealthy for the economy.
Again, to reiterate, I am not arguing that the managers should no longer be paid or that they should make less than those they manage. I'm simply pointing out that, at present, the top tiers of management are making far too much and this effects the income of everyone further down the ladder.
[0]: http://en.wikipedia.org/wiki/Income_inequality_in_the_United...