Unions can be useful.... I have a friend who after 30 years would clearly be fired and replaced by three new employees with no experience because, to a director it looks like he or she saved money and so can be guaranteed a promotion.....
Where I disagree with Unions is that they have no accountability. If they negociate a scrappy deal or employees get no salary increase, they should give back to the employee as a padding or a rainy day situation considering union members do continue to pay the ever increasing fee of union membership.
I see unions here in Quebec(Canada) becoming fabulously rich while their scrape by...
Just look at companies that have seamstresses, they will offer full suits for the higher strata of society and yet the working conditions are like sweat shops.... And they are unionized which makes you wonder how bad it could get....
It feels, from my perspective that unions are useful so long as people can opt out and vote anonymously which is not always the case....