A limited version of federalism is a less miserable solution than the break-up of the euro

http://www.economist.com/node/21555916

That is why we have reluctantly concluded that the nations in the euro zone must share their burdens. The logic is straightforward. The euro zone’s problem is not the debt’s size, but its fragmented structure. Taken as a whole, the stock of euro-zone public debt is 87% of GDP, compared with over 100% in America. Similarly, the banks are not too big for the continent as a whole, just for individual governments. To survive, Europe has to become more federal: the debate is how much more.