In cases where management is above board that pretty much gets rid of them.
When management is corrupt, Voila! Unions appear.
But this is a side issue. If your nation can not stand against outside forces, do unions matter? At all?
Did you ask this because you have no refutation to my original point? If you do not, how does the tactic you just attempted to employ work out ethically?
You are claiming that we need to protect the US steel industry SOLELY in the name of national security. If we protect these industries, how will the unions help with your national security goals?