I figured a high agency explanation would be "what do I need to do in order to stand out above the rest?" I am generally pro-union, but I figure a high agency

I figured a high agency explanation would be "what do I need to do in order to stand out above the rest?" I am generally pro-union, but I figure a high agency individual would not want to be lumped into a group whose mean agency is below theirs. In my personal experience, early in my career, I struggled to have my position un-unionized so I could receive fair compensation. Ironically, the union I was trying to leave helped me, because my market rates would have disrupted their pay scales and they figured it was best to negotiate my exit. I would appreciate sensible counterpoints to this.