I think at least part of the argument is that if the union spends time and money improving general working conditions, you're benefiting regardless of whether or not you're part of the union.
At least if the laws were less hypocritical and applied to all things that improve our living conditions (such as open source software development) then I could understand it, but right now as it is I find it unacceptable.
In the US mandatory union fees for the public sector were struck down by the supreme court, I'm not sure if this also applies to private sector jobs though. This was due to the Janus v AFSC ruling see. https://www.supremecourt.gov/opinions/17pdf/16-1466_2b3j.pdf
Varies from state to state. Some states have union requirements for certain sectors, or as businesses are either unionized or not. Right to work states make it so that there can be no requirement to join a union.
Of course Arizona itself has a weird kind of reverse union of hospitals that covers nursing that afaik hasn't been challenged yet, which seems like it would be either a right to work or trust violation. Can't speak to a broader sense.
> Varies from state to state. Some states have union requirements for certain sectors, or as businesses are either unionized or not. Right to work states make it so that there can be no requirement to join a union.
Even under right-to-work laws, the employees can still be required to be covered under the union contract. Right-to-work laws just mean that the union can't forcibly withhold or charge dues from people who aren't union members.