Maybe they have a role, but I'd vote to eliminate all unions in this day and age. Even if not completely powerless and defunct, they won't have the influence they've used maliciously in the last years.
Their secret ballot initiatives are nothing but a means to make intimidation easier for them. They don't know whom to threaten if they don't know how their members voted. To hell with them.
I'd settle for outlawing unions of government workers.
That's most of them anyway.
The year the first federal union law was passed was the last year black unemployment was lower than white unemployment.
My Conservative Presentation to a Black, Liberal Class by Byron Horatio