Probably e-book pricing. Hachette doesn't really have any reason to come out publicly and says they are trying to keep e-book prices high, since while that is good for authors and Hachette, it's bad for the consumer pocketbook.
[1]Of an amazon monopoly on retail is a bad result, but in principal that has nothing to do with publishers
This kind of unequal distribution can cause the slight lessening of pain for a large number of people to mortally wound the few actually producing content, leading to a serious destabilizing of the market, which requires that both parties have something to provide.
Which was the point of the GP comment, and something you didn't even remotely address, instead making a pedantic point about words chosen for effect.
In the current market, I think that publishers get far too large a fraction of the revenue and authors far too small. If the author creates the content and promotes the content (with the help of Amazon) what value is the publisher adding? Copyediting? Legitimacy stamp?
Amazon pays individual authors 70% of retail. That's far more than they get from any publisher.