Find me one employee who would feel ripped off that their 5000, 10000, or 100000 sell at even $20 instead of some hypothetical number could have been achieved by better hypothetical management. Oh those poor people, should have taken the offer to work at _____ instead?

Not if what we're talking about is facebook getting a higher valuation than they "should" have. If facebook is "really" worth 90 billion, then the employees are going to get x% of 90 billion 6 months from now; that would still be true if the IPO valuation had been 80 billion rather than 100. No?