Not very inspired as an analogy, I know.
... really you couldn't think of a better analogy? Really, nothing at all?
Firstly it's not like Germany hasn't already spent billions of euros trying to save failing European economies, thereby in difference to your analogy definatley using its bucket. But emptying the boat is rather pointless if there is still a bloody HOLE in it. It's quite reasonable to demand the guy responsible for the accident to try to fix it.
I'm guessing the stupidity of sailing in the middle of dark night is representing the stupidity of the idea of the Euro.
Belgian's analogy would be better if it was a long voyage, the hole had been only formed over time with termites and the "Germany" character initially told the "Greek" character to pretend that no termites existed (even though they both knew they did). That would have been one improvement.