Of course Greece, like a lot of other countries and individuals, has been 'lent' too much theoretical money, but exactly what the banks, Wall St, The City of London etc learned from 2008 was that it did not matter how many un-repayable loans they make - they will always be bailed out by the tax-payer.
Except of course Lehmanns which the US did not bail out.
And the Icelandic banks too.
If other banks had been allowed to go to the wall, the real losers would have been as always the poorest - not necessarily because they lost savings but because their employers would have been unable to borrow effectively meaning their jobs would have been lost.
Part of the problem with this is that the Euro was always a triumph of hope over reality - it would only work if the economies of the countries who are members were roughly in step or could keep in step by managing tax rates, interest rates, money supply, government spending - and even from day one there were about four or five economies which actually met the supposed criteria; Germany, Luxembourg, Netherlands and I think Belgium and possibly Ireland. The French didn't and Greece certainly didn't - but the political dream was allowed to supersede the figures. And by surrendering some of the national control over how to balance books the Greek people (and the Spanish and the Irish and the Cypriots etc) are suffering. If Greece had retained the drachma, they could have tried to tax and spend or borrow and spend their way out of their difficulties. Maybe they would have succeeded.
Maybe we are reaching the start of the end of "the system". More likely we are making our way towards a variation of what has gone on before.
If lessons are learned maybe the variation may include more cutting our cloth accordingly both as individuals and countries - and that in my opinion would be a generally good thing.