Sorry - you are getting proper muddled thereYou may believe that Greece would not be in their current predicament if they had either ditched the Euro or pulled out of the EU. Many do not.
I did not say that would be the case
Greece exiting the Euro would have allowed a number of changes to be made that would take them down a different path - but would it address the fundamental issues that result from the 'Greek culture'? - and other EU member states - of course not
And given that you are right to observe that - you have the answer to the question.....
Would the issue of debt-mutualisation be a 'one-off' event?
And then you can start to think of the ramifications of that - an objective assessment, I suggest, is that the UK is best well out of the EU.