AdSense, to my knowledge, doesn't only optimize for maximum CPC but rather for max earnout for Google, a large part of which is the likelihood of you clicking the ad. This is a fair determination of the quality of the "deal"/ad, I suppose.
It is interesting to consider whether expertly targeted ads would see as many click throughs as the ads companies pay to have us see now.
I'm not saying replace the models they have in place, but just offering up something different from a social perspective which google doesn't seem to have a lot of luck with. It will really even the playing field for non-big dollar advertisers.