Cad go back and read the article you posted. The Unions are asking that if they have to represent a non-member they be reinbursed by the employee for up to 65% of the annual dues.
I am not familar with Iowa law but I would assume like other states the Law dictates that the Union must provide all the same benefits to non-members that they do to their members.
Essentially the Union is asking them to be allowed to bill for Services not prepaid in membership.
Its a deal for non-members imo.
If the non-members have a problem with this they could go together and hire a lobbist to change the law so they dont have to become a member, dont have to pay dues, dont get the same wages negotiated for(take what the state gives them), dont get represented by the Union legal team in labor disputes.
Personally I think they should focus all their efforts on opting out of membership
Also I would like to point out that the very reason people are attracted to a job usually is because of the pay and benefits....the only two things the Union really cares about so who needs who?