Anyone who understands the economics of the marketplace.
that's arrogant and wrong at once. at this stage of market monetization, it's impossible for google to do without its content network. so they have to please publishers as well. a one-sided approach which only makes advertisers happy will not help.
I have nothing against publishers. It is just an aspect of this particular situation that publishers do not have as much control over this market as you seem to think. Anyone who disagrees with me could prove me wrong, however -- leave AdSense and convince every other publisher to do so. (Funny how I have heard almost no indication of anyone doing that.)
google should have the control over this market for its sake. it would be fatal, if they let advertisers or publishers decide which way to go. instead, they have rightly decided to care for user experience. for this reason they deploy things like smart pricing and landing page quality algorithms. in the recent days, you will have noticed, that they don't shy to clear up their advertiser base. it's not my intention to leave adsense as i don't see adsense working to my disadvantage at the moment. however, publishers will certainly leave, if earnings are going down and other options promise better chances.