NRPLUS MEMBER ARTICLE O ne of the reasons that the euro zone has survived for as long as it has is the impressive ability of its leaders to postpone dealing with a series of questions that are as fundamental as they are inconvenient. Is it possible to sustain a monetary union without a fiscal union? (Probably not.) Is it possible to establish a fiscal union without genuine democratic consent? (We may yet find out.) And suddenly pressing: What is the relationship between the EU’s law and Germany’s?