Union is fine as long it's voluntary. If I can keep doing my job and choose whether I join one or not, there's no problem as far as I'm concerned. But does that happen? Unions typically move to mandate that everyone has to be their member, typically making bullshit argument that everyone benefits from their presence, so everybody has to be their member.
Anything that's not voluntary is wrong. You don't force your friend to be your friend. You don't force your wife to be your wife. Why would you force people to join your club if they don't want it?
US law says no one can be forced to join a union. Unions are forced to represent non members. Most states force unions to do it for free if a non member chooses. The others force non members to pay for the services the union is forced to provide.
I may not understand something...In such case why is there a vote? If union is a voluntary organization, then why can't people who are for unionizing just open an organization and join it at will? Who prevents them, it's their own private club, there is no need to vote. People open unions when they choose without asking anybody for permission, why can't these folks?
Anything that's not voluntary is wrong. You don't force your friend to be your friend. You don't force your wife to be your wife. Why would you force people to join your club if they don't want it?