"Germany has also benefited from the fixed exchange rate that the Euro effectively secures between itself and its major European markets. This means that its export boom was not offset by a rise in its own currency. If Germany had been outside the Euro, currency appreciation would have hurt Germany’s gains. Not so in the Eurozone.
While Germany has benefited so much from the Eurozone, its less successful partners are left to fend for themselves. The Eurozone lacks the automatic stabilizers that other currency unions apply among the various regions — namely, fiscal transfers such as unemployment and housing benefits, shared health care costs, or the pooling of bank risks and deposit insurance. The Eurozone also lacks the large movement of workers across state borders enjoyed by the United States, mostly due to language and regulatory barriers. These institutional features of the Eurozone have created a highly unfair economic union, which magnifies disproportionately the consequences of failure."