If the Eurozone wants to stabilize its unifying currency, then they must cast out the offal that deceptively slipped into the Zone without playing by the rules in the first place.
Greece has got to go.
Italy and Spain may have to consider also releasing themselves from the Euro Common Market, and return to floating their own fiat currency.
A strong Greece will never reassert itself as long as it continues to rely on handouts from Germany.
Let Greece default. The severe market correction to follow will be severe, yet private banks and local governments will learn from this dramatic shock never again to play fast and loose with easy credit on the taxpayer dole.