Michigan is now a "right to work" state. People can work anywhere, whether union or not, and not be forced to pay union dues.
All in all, that's the way things should be, in my opinion. Unions can serve a very useful purpose, but not while demanding money and using a government body to dictate everyone should belong. If they have something to offer that people want, they'll make the effort to join. If not, then they can suffer the consequences.
I know the unions will cause problems, including using violence in an attempt to regain power. It won't work. People eventually become horrified of the thuggery and the biggest loser will be the unions. Instead of promoting a path to a successful career, they'll be perceived as promoters of organized crime and the members will be tainted forever as criminals.