As usual, "Google" here means the two individual human beings who together have a controlling interest in Google, Page and Brin. It may also mean some other people, but it certainly means them. To be clear, that's not to suggest that everything dubious about Google can be put on their shoulders. Some Google issues are genuinely hard to solve; some are deep enough in the weeds that they may plausibly never have heard of them or not have time for them. AdSense being a sewer doesn't seem to be one of those.