Parkinson's Law [work/dysfunction fills a void]

wiki link;

http://en.wikipedia.org/wiki/Parkinson's_law

link to radio 4 programme extolling its virtues;

http://www.bbc.co.uk/programmes/p01bctk3

and the original text in The Economist;

http://www.economist.com/node/14116121

and finally mathematical confirmation of the great mans wit and observation;

http://arxiv.org/pdf/0808.1684.pdf