Nobody who's really, really good wants to work at a company that's 99.9999% diluted.
If you're a really good MBA or developer you deserve to get rich, and you will never get that rich on level 64 bonuses. Meanwhile you will see your colleagues that took the chance move way past you in the game of life.
Lenn probably has huge stock vested at Facebook waiting to sell it by now. Meanwhile where are his old colleagues?
That's why huge companies become old. You can only divide the pie so many ways. Microsoft is a shadow of it's former self.
Level 65 which is directly below the executive class is only 130k/y.