They take your 3hrs a month, put half in their pockets and send the other half to democrat candidates. At least that's what the UAW did when I was in a union shop.I am part of a different union. I got this new job about a year ago and after a few months, I felt like my ideas for improvement were not appreciated. I stopped putting those forward and am much more pleasant. I was also not bold enough to ask for something like an improvement to a process, only more on the lines of getting more info from the union on what they do for myself and my 11 coworkers in the section who pay 3 hours wages a month for union dues.
Your union should have something of a collective bargaining agreement which will detail the process of how to make the changes.