https://www.youtube.com/watch?v=j5a_00YVVkQ&feature=youtu.be...
My experience with unions. Monitor breaks at CES. Go get another, try to carry to booth. Get stopped because "only union people are allowed to carry equipment inside the convention center". Try to plug in some equipment. Get stopped because "only union electricians are allowed to plug in equipment in the convention center"
I know others who have add similar experiences in the aerospace industry where responsibilities were divided up and person A is not allowed do any work outside of their designated job.
For example, your job is to write UX features, some else's job is to unit tests. You're not allowed to write unit tests.
Why I would I want that?