Amazon is eee-vile!: they discount books and devalue literature!
Amazon is eee-ville!: they don't discount old, slow-selling books enough to boost sales!
In every other business, when a product's sales decline, the *supplier* drops the price, runs an ad campaign, or gives retailers incentives to drop prices (while keeping their margin more or less constant).
But No!, publishing is a special snowflake and they expect everybody upstream and downstream to sacrifice so the publishers can maintain their sales without lifting a finger. (And if something goes wrong... well, there is the handy-dandy ready-made answer to everything: blame Amazon!)
Maybe if the publisher did something vaguely resembling backlist promotion or stopped pricing old releases as if they were still new, they might get enough volume to goose sales.
If they don't like how Amazon does business, why don't they *stop* doing business with Amazon? It's only 25% of the pbook market, after all...