My point is this: Though they may have taken Jeff Bezos on for his expertise, Bezos made his investment to earn a return. You don't invest in private or public stocks in a capitalist world to do just fine. You don't start a business for that reason either. That's not greed, that's entrepreneurship.
They're not the only investors. They've taken outside funding (only because they wanted to, not because they had to). Either way, I doubt their investors care much because 37s wouldn't have taken them on if they didn't have compatible values.