However, consider the other group of people this helps. Minorities, H1B holders, other commonly discriminated classes, who discover they are doing the same work as a colleague and being payed 1/3 the rate. Should these folks get screwed over so you can get your negotiated high pay? Has the trade off even been considered?
I'm not saying you're wrong. I just want to make clear what the other side is arguing for - and it's not some evil plot to screw you in particular. It's to help a different group.