I guess you give the same amount of kickers to every employee. Wont the kickers then be too diluted to be worth anything? I haven't done the math, just a feeling.
It's a great idea because it means that average employees will actually be motivated by the equity; let's be honest, 0.05%, vesting over 4 years, of a 100-person company isn't enough to motivate anyone except for a starry-eyed young kid on his first startup.
If Silicon Valley ever wants to grow up and remain innovative, that's the sort of thing we'll need. A 0.05% slice is just a bonus and, compared to Wall Street, a pretty weak one.