I think the problem is and has always been when politician's think they know better than the economists or only believe the ones which tell them what they want to know.
In the case of the Euro, the concerns of economists were ditched in favour of expanding the Euro across many countries as possible. A purely political decision.
But time & time again we've proven no amount of politics can take on the market. Major tried it with the ERM. They tried to manipulate the markets to keep Sterling in it at an artifical level which was too high. Eventually we were ejected.
Brown proved he was a complete baffoon by declaring the end to boom & bust before ripping open the nation's chequebook. Something any economics teacher will tell you is impossible in a free market economy.
France/Germany are now paying for the same decision with the Euro by letting the PIGS countries join when their economy was nowhere near aligned enough.
I watched something a while back on TV where our beloved MP's were asked very simple questions on the economic crisis and many of them completely failed to understand the difference between the deficit, the national debt and most couldn't even get the deficit in the right ball park. In that context, how can we trust them to dig us out of the hole we're in???
In my opinion, Greece needs to be allowed to default now rather than pile on the woes for their poor citizens because i think we're simply delaying the inevitable.
I also think the Greek people should ask themselves if there's a case to answer for their previous politician's who seemed to be quite happy to borrow eyewatering amounts of money without thinking how it will be paid back. They've borrowed 30k Euros in the name of every man, woman & child. They turned a blind eye to an out of control public sector and allowed a lax tax collection regime. Personally I think that would amount to gross misconduct in a public office.