They can have all the collective voice they want. They can get together after work and yell as loud as they want. What they have no right to is a Union that they are forced to join. The Union has no right to take their money. It is up to the State to decide.
Where do you get this "second class citizen" bull**** ? Are only that part of the workforce that are in Unions "first-class" ?
The argument you have made is just plain stooooopid.