JonDE said:
Personally I think the Euro needs to break up.
All arguments you make can be made for the US too. Does Michigan pay for California's spending (or debt level), and does the US need to break up over that?
There is no long term problem unless there isn't enough money being pumped to the deficit states from the surplus states. Until now, that probably happened with public debt, financial markets, the free commidity market, and other means.
Honestly, the system is pretty damned good since governments are, need to be, run like companies, and there's one central bank overseeing the banking system and currency.
There are only two questions: Are the debt levels of the individual economies too high to be sustainable in this system? (I would say no, except for Greece.) And second, is there enough money being pumped around between the states?
The first is debatable, if not, then Eurobonds. The second is probably okay at the moment, with the addendum that the surplus states probably will need to pay some for Greek pensions, which honestly, is a whatever. And a second addendum that part of the current mess is the result of sending too much money to the periphery, not too less.
Everything else: The balance of trade, the external debt, the amount of money, the number of assets, look okay for the Eurozone. Most of the news, therefor, is short-term humbug. It can all be solved, and since it can be solved, it will be solved.
(There's also the point that devaluing in current day markets might not work as good anymore as it used to, since everything is hedged anyway.)
(I am not an economist, so this is pretty much my layman's view.)