[Vautrin]

Yes, but most of the unemployment rate is caused by unemployment in the former East Germany. Don't forget that the average working hour in Germany is much more productive than the average working hour in the US. In the East there are simply but a few jobs.
In a lot of cases West-German companies bought their East-German counterparts with huge subsidies from the State, only to close the acquired companies down. Thus giving these companies billions of dollars in tax breaks and subsidies, which were subsequently pocketed by the shareholders, and companies themselves.

Part of the problem is of course the difference in mentality in West- and East-Germany. But no political party can change that, and the only thing that can offer hope to people in East-Germany is lasting employment, and industrial and service indrustry jobs.
You cannot realistically make a legal exception for employment rights in East-Germany and expect the people who get paid less (and that is what is happening) to be content with that. Nor can you make a drastic lowering in legal rights of employees in the whole of Germany and expecting people to be happy about it.