I am not sure if google could have done that but there is always the realization to be made that small is beautiful. At some point growth turns into taking on more useless people and then you need more money to fund all of them and then you need to turn to unethical practices. Perhaps the google founders could at some point have decided to buy back as much of their stock as possible and after that they no longer would have needed to make as much money as possible and could have just kept having the greatest search engine with a little advertising on the side.