The bad news is, the so called german money does not really go to greece. It goes to the banks that have plundered greece.
Ok those greeks were open to take all those debts with open hands to raise their wealth. Their fault.
Unfortunately germany will loose a "customer" if greece drops out. Plus it will open the door for Portugal, Spain, Italy ...
To avoid this the greek economy is strangled to death. What a plan?!?
Look into history:
What happened when the Spaniards robbed the incan gold? Econony went down!
Yes that gold was definitely cursed, as was the Euro for Greece.
The Spaniards didn´t know about the curse in those days, greeks had meanwhile forgotten the lesson. Just wait the Spaniards and the Portuguese have either.
Officially they had this thing called Dinar but the(ir) Deutsche Mark is still alive prospering.
No longer in Slovenia they went for the Euro, less in Croatia they use Kunas and prepare for the Euro, but in all the rest Bosnia and Herzegovina, Serbia, Montenegro still use it. In 1997 the bulgarian Lew was coupled 1:1 to the Deutsche Mark. It worked well for them. They took the money real mony, but no nay never no loans in that currency.
What do we learn? If you do it wisely, like Yugoslavia did at the end of last millenium, it will work. Even if the currency used is from a much stronger economy.