It is not. The whole point of the EU is to pool sovereignty for common benefit. Germany is constrained in things it can do: it cannot ban the importing of Frenc

It is not. The whole point of the EU is to pool sovereignty for common benefit. Germany is constrained in things it can do: it cannot ban the importing of French wine, give huge subsidies to its domestic steel industry to gain market share in Europe, or stop Bulgarians entering the country. Of course, there is no EU army enforcing EU law, so a sufficiently damn-the-consequences German government could do these things, at the cost of destroying the single market.