BRUSSELS – A few months ago, 25 of the 27 members of the European Union solemnly signed a treaty that committed them to enshrining tough deficit limits in their national constitutions. This so-called “fiscal compact” was the key condition to get Germany to agree to increase substantially the funding for the eurozone’s rescue funds, and for the European Central Bank to conduct its €1 trillion “long-term refinancing operation” (LTRO), which was essential to stabilizing financial markets.