If publishers don't like Amazon's terms, they should pull their books. Sell via other book stores who will now have books Amazon does not. Sell the books DRM free and provide an email to your kindle option along with instructions on how to authorise an email address then you can still target amazon customers.
Will Amazon pull print books in retaliation, maybe. However, if this is common for all publishers to be squeezed, once one makes a stand, I imagine others will start to follow. Just don't collude to do whatever you intend to do
Easier said than done I know and a publisher may take a significant loss by pulling out of Amazon, then again, what's the saying about putting all your eggs in one basket?