why bureaus seek to expand C. North-cote parkinson's famous first law states that , "work expands so as to fill the time available for its completion. its major corollary further add that,"In any public administrative department not actually at war,the staff increase will invariably prove to be between 5.17 per cent and 6.56 per cent (per year),irrespective of variation in the amount of work (if any) to be done