Maybe. Or how about this:
Charlie didn't make $20M for cooking. He effectively made a normal chef's salary, some of which he effectively invested into Google shares.
What's the issue? That a chef (unlike a banker or programmer) helps fund a company, and gets shares for it?
Is like saying to an angel you didn´t help me so much in your mentoring so give me your shares back.
But it seems a lot like tearing up a term sheet 5 minutes from signing the final contract, just because you managed to shop for a better deal. It might be legal, but it's just not done.
What we can be fair about is how we treat people, if we give them shares and later we wish we hadn't we should live with that gracefully. We can give them bonuses for both self-interested (motivate employees) or altruistic reasons (it happens!).