The Greeks have been fraudulently living beyond their ability to tax. They also appear to be unable to stop doing it, as the Greek people keep expecting Brussels to send them more money. As bad as things are now, they will get worse when the rest of Europe stops lending them money, which could happen any day now. If Merkel's government collapses there will be a European paralysis for a couple of months, and there is a good chance that whatever government is elected will have pledged itself to no longer prop up the PIIGS. It's only a couple of years at most before we see the reemergence of at least one and maybe both of the drachma and the mark. Either Greece is kicked out of the Eurozone for its inability to meet the conditions or Germany decides it's no longer go be part of the farce.
Actually it is Germany which is to blame for the troubles, not Greece.