system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 the current eurozone 'crisis' and the situation with Greece.
gpt
Oh god, any answer to this is going to be complicated.

Imagine in your class everyone pools all the sweets together and shares them out.  That is a bit like Greece.  If there aren't enough sweets for everyone, then the teacher gives out more that she has loaned from other classes on the basis that they will give back 6 sweets for every 5 they have, because she thinks that tomorrow you'll bring in more sweets.

Then it turns out that all the other classes in your year group do the same things with their sweets, so it makes sense to do it all together.  You make up a big lie about the number of sweets in your class, how many you have loaned from other classes and how many you owe back.

Except now the person who loaned sweets to your teacher wants them back and your teacher doesn't have enough to give them back.  To keep your class with the right number of sweets and pay back those that she owes sweets to, she borrows more sweets at an increasingly rubbish exchange (5 sweets given, 10 given back next week).

Now it turns out that your teacher has been borrowing sweets from people in other classes in your year as well as other years.  The head of your year says that enough is enough and puts down their foot.  They tell all the people that your teacher owes sweets to that they're only going to get half the number that they originally asked for back and that your class now has to make do with fewer sweets.  The head of year makes up for this by giving out a load of extra sweets to all the people in your year.

There seems like no winners:

* You get fewer sweets in your class than you did before
* The people your teacher owed sweets to only get half of the number they did before
* The teacher gets rapped on the wrist for being irresponsible and lying

However the only alternative to this situation would have resulted in your year pulling out of the group sharing system:

* You would have had to make do with the number of sweets that you have, without having any from other classes, which would be fewer than you've had for a long time (and fewer than under the head of year bailout).  
* Your teacher would be unable to borrow sweets any more because everyone knows she's lying about being able to be pay back, so there wouldn't be an option of getting more in the future.  
* All the people you owed sweets to would be livid and may not have enough sweets in their own classes now.