It is inconsistent to claim national sovereignty while at the same time calling for more European solidarity. 5. Conclusion  Europe is therefore still facing major challenges. A large number of fundamental decisions aiming at more economic growth and a durably stable monetary union still have to be taken. The sooner they are taken, the better.
Having said that, the description “durably stable” has two sides to it. What has to be “durably stable” is, first of all, the regulatory framework. This will only be possible once liability and control are in alignment and once solidarity and sovereignty are in balance. Public finances, too, have to be “durably stable”, however.