So once again it comes to the Parliament, who can try to change the rules by which CAP is administered.
Also, the EP can only act on a proposal for legislation initiated by the Commission. Most economists teach a theoretical framework that has been shown to be fundamentally useless. -- James K. Galbraith
While the Commission proposes legislation and is installed to take an EU wide viewpoint, rather than serve national interests, in practice that legislation does not come out of nowhere. The C of the EU, the Parliament etc can all make noise that influences the choice of those proposals for legislation. With Lisbon, the noise coming from the EP would be that little bit louder. You can't be me, I'm taken
How much can Parliament do re the framing of the CAP, is a question I'm interested in finding out about.