yuo were not quite right on the point of cashing out by the founders. They are restricted to reduce both class C and B shares at the same time if they sell shares. SO, they lose voting shares too if they sell.
They made a good point on Fast Money that being a public company is the only effective way for the founders to cash out. And cashing out means owning fewer shares, which means a voting class to retain your Kingdom. I thought Google would be a different animal, that the founders weren't PowerMad, but turns out they're as egotistical as the next man. Nobody can do it better than me....yeah right.