Actually, if I owed my bank a ton of money, they would be desperate to do a deal with me, some kind of debt restructuring, for the simple reason that if we don't do that, I could chose to go bankrupt, in which case the bank would get about 5p in the £.
Same with Greece, if they leave the euro, what chances of ever getting any money back for the loan-sharks, sorry, the French and German banks.
It's strange how Germany had some of its debts cancelled in the 50s, but hang on, that was Germany who now have the whip hand. I think the UK and US also helped Germany re-establish various industries such as cars, but hey, those were the good old days, today the loan-sharks are king, that's life indeed.