So much good in this article, but this paragraph pretty much sums it all up. Give the entire thing a read it is not that long.

Scott Adams Blog: The Management-free Organization 03/25/2013: “That decision-making model might not work in your company if some of your coworkers are worthless. There’s always the one person in every meeting who keeps changing the topic, or doesn’t understand the issue, or insists he knows more than he does, or is bluffing to cover his ass, or is jockeying for a promotion, and so on. To put it in clearer terms: Management exists to minimize the problems created by its own hiring mistakes.”