[lazyeye]

Germany loves the common market due to the way their economy is structured. Normally what happens for a major exporting country is that their currency (Deutschmark) would go up in value because of high demand to pay for German goods. This drives up the cost of their goods making them less attractive.

But in the common market with a shared currency they are able to keep the cost of their goods artificially low due to other countries absorbing the demand for the currency.

So where Germany wins, you can guess that other countries lose.