No that's the point; once you're in the Euro, you're stuck there. If they still had the Drachma, they could devalue it, and then more tourists would flock there for cheaper holidays, they'd sell more olive oil as it'd be cheaper. None of the above countries would be stonger under their original currencies, but they wouldn't have been given loans that they can't repay, and they'd still be in control of their own destinies, so do you give a kid the keys to a sweet shop, when you know they have a sweet tooth, or do you act as a responsible lender. Did Brussels know what they were doing, or were they just being negligently irresponsible.
Greece being let into the Euro, was just a expansion opportunity by Germany and France, and now they seem to think they are European rather than mediteranian. They brought little to the table, but money flowed into them to help them out, so that's the fault of Brussels.