SNAFU — True communication is possible only between equals, because inferiors are more consistently rewarded for telling their superiors pleasant lies than for telling the truth.
Peter Principle — in a hierarchy, every employee tends to rise to his level of incompetence; work is accomplished by those employees who have not yet reached their level of incompetence
Dilbert Principle — leadership is nature's way of removing morons from the productive flow
Dunning–Kruger effect — "The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt." (here's the long version, it's a great read)