There has been interesting discussions about unions. Some say that they are against people being in work. Well, let me say, that considering they depend on people who are working joining them, that is an insane argument.
I have noted in my job, that when seeing people with work induced stress, people who are members of a union are treated better than those who are not. Management appears to be more careful in treating a member of a union compared with those who are not in one. Although the same laws apply to those who are or not in a union (due to the work of the unions), due to the advocacy that workers in a union get, employment law appears to be followed better in these cases.
I however had joined a union before I saw (in my job) how unions had helped others. And by being part of a union, in one of my jobs, our employment rights, which had been bent by our employer, were followed when challenged. We had tried to discuss this matter without the help of the union, but we got no where, but when our union was involved, they told us what we needed to do to bring about the change we asked for, and once we did that, our employer had no choice but to accept that they were not following employment law.
My union has not always been successful in bringing about change, but I know that like other union members across the planet, I have more security from being in a union, compared to not being in one.