It's hard to tell what really happens from the outside, but Google's founders don't seem to have maintained as strong a hands-on role in company direction/culture/decisions as, say, Microsoft in its Gates-led years.
In particular, as of December 31, 2007, our two founders and our CEO, Larry, Sergey and Eric, owned approximately 88% of our outstanding Class B common stock, representing approximately 67% of the voting power of our outstanding capital stock.
https://investor.google.com/documents/2007_Google_AnnualRepo...
California just created a new corporation type that allows 'public benefit' to take precedence over shareholder interest:
take a look at, for instance, http://en.wikipedia.org/wiki/Business_judgment_rule
A bit less drastic, as a 'second-class' Google stock is just 1/10th of the vote, whereas a 'second-class' berk is 1/20th (25th?, dunno) of the vote, but more importantly doesn't cost 100k/share. I don't know what berk b's price is at, but there's a much smaller set of people who can actually buy berk a shares. 100k is a lot for the average joe to invest in a single share :(