Lastly, there IS one way to experimentally test how much a PD is worth, at least to PIs, and you are promoting that test, whether you know it or not. And that is a PD strike. I would love to see you discussing how spoiled PDs are in between gel runs because your PD is really not there. I think 50K/yr wouldn't sound that much then.
Go ahead dudes, you have nothing to lose but your chains.