being a public company, Google can't really justify altruistic endeavours to its shareholders unless they will also benefit from the project.
Regarding the share structure, Google has two classes of shares, or maybe three by now. Class C shares don't get to vote, and I can't remember if they exist yet (IIRC they were voted into existence a year ago, but only pending various hurdles that I think might not have yet been cleared). Class B shares are worth 10x as much as Class A shares, for voting purposes. Guess who owns most (all?) of the Class B shares.
Anyway, the various share classes are all a bit beside-the-point. The real point is that when you add up all the votes, Larry and Sergey control a lot of them. And then there's Eric. And then there are a few CxOs/SVPs with meaningful shares. So basically a small group of people, who have led Google to its current state, are in control. Other shareholders are just along for the ride.
On top of all that, Google has always warned potential buyers that they don't give a shit about quarterly earnings, and they care about long plays and such, from the IPO forward. If minority shareholders were to sue the company for lack of fiduciary care, I think this would go poorly for them.
You could look up modern SEC filings to have a more-detailed breakdown, but here's a years-out-of-date summary I found with a few minutes use of... you guessed it.