Why is it necessary to have a union in order to have a "workers council"?
It isn’t. That is a blatant lie.
The union lied to VW and the workers.
Probably part of the National Labor Relations Act and included because the unions want to control those councils and argued that without a union they (the councils would be controlled by management).
Personally I am surprised that VW in Germany supported this union drive. From what I can tell, the UAW influenced the German autoworkers union to pressure VW management. Also the German autoworker union by German law has seats on the VW board of directors.
Probably part of the National Labor Relations Act and included because the unions want to control those councils and argued that without a union they (the councils would be controlled by management).
Personally I am surprised that VW in Germany supported this union drive. From what I can tell, the UAW influenced the German autoworkers union to pressure VW management. Also the German autoworker union by German law has seats on the VW board of directors.