You might be amazed how easy it is to rationalize such concerns away for $250k (or more) per year. The first sentence of the internal response of a Googler will be, "You don't understand."
Going out of your way to work for a mega-corp like Google is unnecessary.
To work at Google has to be an ethical decision by now. If you are not at Google internally working against its evil tactics subverting it wherever you can and work against its taking over the web, then you are probably working for the evil machinery. For an entity spying on people wherever it gets the chance, seducing uneducated people into helping them to track as many people as they can online and shred their privacy, while trying to come up with "new standards" all the time, trying to make others jump on the bandwagon to unfree Internet.
So in general, a person with ethical concerns should avoid working for Google, no matter how good the pay.