To the best of my understanding, from Greece's perspective the situation is a bit similar to Brazil back in the 1980s.
We had dealings with the IMF back then. It was the oddest of situations. For the best part of ten years (perhaps more than ten years) the news and public opinion just kept harping on and on about how important it was that the IMF did as our government wanted. At the same time, one of the most frequent Brazilian attitudes was complaining about the outrage that the "loss of sovereignity" was.
Yes, we complained all the time about how unfair it was that the IMF expected to have some say on our economic policies just because we were asking it for money.
Brazilians are funny like that ... but I don't know that in this respect we are all that unusual. The USA has supply side economics, climate change denial and insistence on keep growing a "defense" budget that is already ludicrous, for instance.
It seems that any community thinks of itself as deserving of privilege as a matter of fact.
But Greece looks like a more direct comparison to Brazil in the 1980s to me. High inefficiency, chronic insolvency, poor job market, contradictory expectations about foreign nations and institutions.
Basically, it is a sorry mess, but people just don't know how to accept that kind of responsibility, and take refuge in xenophoby and nationalism. It is always the nationalism.
Personally, I don't think there is any course of action worth bothering about at the purely financial level. Forgiving the payments ad eternum is of course out of question. On the other hand, allowing a whole community - one with a troubled history with its neighbors no less, as Greece has had fairly recent conflicts with the Ottoman Empire and had a hand in complex roles in various Balkanic conflicts and was invaded by Germany and Italy in WW2 - can only lead to disaster.
Any true solution will have to earn the confidence of the Greek people and involve motivating them into better solvency. But by far the most likely consequences now will be a split between Greece and the EU, followed by growing radicalism and economic hardships in Greece. Sooner or later it will lead to armed conflict or a comparable tragedy. National pride will forbid less traumatic solutions and lack of foreign interest will make those few and far between anyway.