Elsewhere: CAP reform and ugly aunts

Nosemonkey is musing on the CAP, and I just had to point this line out:

treat the CAP in much the way you would an unfortunate, but extremely prominent, pus-dribbling wart on the face of a beloved aunt

Essentially, the benefits of EU membership outweigh the problems. Long term, our only real chance of economic stability is within a trading block, and I personally favour the EU over the Anglosphere. But in order for the EU to survive, it's problems must be reformed. Can someone please explain this to those who perpetually block CAP reform? Maybe we could just throw the French out and the rest of the EU can get on fine?