The purpose of the EU has been, and always will be, to give France and Germany the total control over Europe through economic means that a couple of centuries of on-again, off-again warfare failed to accomplish.
Looks like it's working (except for the UK's refusal to get completely on board).
Germany has been prospering mightily off the backs of the PIGs. If the Euro dies, the Deutschmark will shoot up through the roof and Germany will be out of the export business.