Earlier quoted context omitted.
The government may some day think otherwise. Google's monopoly on search is substantial enough that they risk much by eschewing fairness in favor of quality. I would tread very lightly if I were in Google's shoes.
Good luck defining "fairness". That regulation is going to go really well.
However, there is a very real perception of "fairness", and often the status quo defines that perception. Whatever changes Google makes will be interpreted as unfair by someone, and given their dominant status - that could be a problem if enough people get nervous.