British Trades Unions are also forbidden to call Wilcat Strikes. And in fact Wildcat Strikes is properly the term for what happens when a bunch of workers down tools without being authorised to do so by their union.

And so forth. British Trades Unions have all the restrictions German ones do, and then some, but without the rights which German unions have by law to balance things up.
The arrangements in Germany are essentially the ones designed by representatives of British Trades Unions after the war.