"In a Hierarchy Every Employee Tends to Rise to His Level of Incompetence" Laurence J. Peter.
In her blog in Elfinancierocr.com, Margaret Grigsby reviews Peter Principle, using as a paradigmatic example the case of Diego Maradona, and his performance as football player and now as head coach of Argentina's national soccer team.
She says: "It is frequent for employees to be promoted based on their functional or technical skills.