Leaving the euro zone is in Greece's own interest anyway. Greece is in the position it is today because it cannot execute on its structural reforms. It still cannot raise taxes and has an overweight public sector. Leaving the euro zone will at least improve competitivity and give them a fighting chance to produce again.

And this is beside the moral position of demanding that the german tax payers cover the expenses of the Greek state that the Greek tax payers can't be bothered to pay.

Disruption is often necessary. European countries have a nasty habbit of preferring a permanent mild pain to a greater upfront pain and then drawing a line and starting on a right foot.