Apparently a chunk of the debt(£8bn?) is held by Greek pension funds. Greek pensions would continue to go down the drain.
Their problems are not all down the the Euro or even the EU. How is a pension system that allows many to retire at 55 or allows non-married women to inherit the pensions of their parents
ever going to work?
Any fudging of the books before the entered the Euro is proof that that the Greek Economy was rubbish to begin with. Their problems are systemic and will continue while they ignore them. Nobody is going to want to invest there. That is not going to make it any easier.