Wait, are you Greek?
But on a serious note: You want me to give you 100 pieces of gold, and you promise to (maybe) pay back 90. Why would anyone who is half-way sane do that? You cannot really be serious about that idea.
Not Greek myself, and I don't really care about the Greek financial crisis (I have my own problems :-) ).
However, this sort of 100% money-centered capitalism has me baffled.
Gold like money is not very useful in itself. Gold can be exchanged for "things". To simplify, let's call these "things" food.
So Gold can be exchanged for "food".
I am a milk Farm owner. and I owe you 50 Liters of milk (worth 50 gold). Also, I am about to go bankrupt because of some unforeseen circumstance (One of my cows was run-over by a tractor). I tell you that If I don't get 10 gold now and buy a new cow, I will go bankrupt imediately.
This means two things to you:
1. You will not get your 50L of milk,
2. If I was the only milk-farmer, you will need to start importing your milk. (Unless you think a banker can operate a milk farm).
As such it might be in your financial interests to give me money for free.Specifically, giving me 10 gold is worth 40 gold for you (if you think that I will not go bankrupt again).
This is why it sometimes makes financial sense to give some people money. I do not like the rhetoric above which assumes that it is always a bad financial idea.
The big story is not that Germany has 10 gold, the big story is that Germany wants 50L of milk from Greece. If they believe that Greece will supply those 50L of milk, then it would be an excellent idea to give them 10 gold for it. (Assuming that they can't just sue 41L of milk from Greece. [And this is the real question.] )