Anecdotally, I have worked for 3 F500 companies and all of their CEOs were the children of founders. Their siblings also sat on the board.
I worked for 2 municipalities where the children of managers were also on staff.
I worked for an investment firm that the owner was the founder’s son and all of his kids had tenure at the firm in the form of “internships” that basically helped fluff their resumes.
My point is that saying “nepotism is the name of the game” isn’t isolated to unions.