I would spin this a little differently. There certainly are a lot of ambitious people at Google. Googlers have a lot of stock options and/or RSU's and care when it goes up. There was also Eric Schmidt's slogan, something about more revenue solving nearly all problems.

But, the company was founded by idealists and is immune from takeover. It attracts idealists (or at least, it used to). Everything is justified in terms of helping users somehow. Justifying things in terms of getting a short-term stock boost generally isn't done, at least not where ordinary employees can hear about it.