It was expressed in 1958 by C. Nothcote Parkinson in the book The Parkinson's Law, based on a long experience in the British administration. The scientific observations which contributed doubts development of law took into account increase among employees in the Office of colonial business, this in spite of the decline of British Empire at the same time.
According to Parkinson, conceals dissect owed to two force:
1. « A civil servant intends to multiply his subordinates, not his rivals. » and
2. « The civil servants create job mutually. »
He also noted that the total of the employees of an administration augmented from 5 to 7 % a year « independently of any variation of the working quantity to be fulfilled (if need be) ».