The primary problem is that conditions in individual EMU members may develop in such different ways that some national political leaders could be tempted to conclude that their countries would be better served by adopting a mix of policies different from that of the other members.
Le grand problème, c’est que la situation de chaque membre de l’UEM risque d’évoluer de façons si diverses que certains leaders politiques nationaux pourraient trouver plus judicieux d’adopter des politiques divergentes de celles des autres membres.