Greece has been cooking the books for a long time, even their entrance into the EU was fradulant. Greece is the blame here via its decades of fraud that finally caught up with it. As a Greek-American with an interest in Greece being successful I think all the finger pointing at Wall Street or Germany is asinine. Greece is horribly corrupt and tax dodging is like its national sport. Its like someone turned Chicago into a country. All of its out of control spending, unsustainable union perks, and unrealistic pensions finally caught up with it, just like its happening in Chicago right now. The difference is Chicago and Illinois can raise taxes and make appropriate cuts over the long term, but Greece won't unless strong-armed by Germany and others.
Ultimately, a shared currency with nations with such disparate levels of income and corruption just doesn't work out in real life like it does on paper. Arguably, Greece could have restructured its debt and engaged in inflation with its own currency and handled this much better, but that's not an option when you're wed to the Euro. Personally, I like the idea of the EU, but a shared currency is extremely questionable.
Credit ratings are just that, ratings, not investment advice and like all ratings should be understood to be of limited value. A nation state can hide quite a bit from organizations like Moody's and every election changes leadership, so there's no static "Greece." Instead its a handful of parties fighting for power with different agendas and goals and with differing levels of corruption and incompetence with a baseline being pretty bad to begin with. Heck even senior Moody's staff were warning investors about Greece and its dealings with Goldman[1]. You'd have to be a little thick to think that AAA rating meant no-risk. All investment involves risk.
I suspect the larger economies always saw Greece as their 'little brother' and countries like Germany had a sort of "Well, if we give them money, they'll build industry and catch up to us eventually," instead Greece blew it on pensions for people retiring at 50, questionable social programs, and other unsustainable and unwise spending.
I sense a high level of paternalism in general from other Europeans especially when I'm perceived as a native Greek when in Europe. Sadly, I think everyone would be better off if we were rougher with Greece and instead of seeing it as our tourist-friendly 'little brother,' but instead as our dishonest and thieving neighbor. I hope this current crisis has changed perception and paternalist attitudes in Europe and made everyone think about the limitations a shared currency creates.
[1]
http://www.nytimes.com/2010/02/14/business/global/14debt.htm...
In 2008, Goldman helped the bank put the swap into a legal entity called Titlos. But the bank retained the bonds that Titlos issued, according to Dealogic, a financial research firm, for use as collateral to borrow even more from the European Central Bank.
Edward Manchester, a senior vice president at the Moody’s credit rating agency, said the deal would ultimately be a money-loser for Greece because of its long-term payment obligations.
Referring to the Titlos swap with the government of Greece, he said: “This swap is always going to be unprofitable for the Greek government.”