or Parkinson's Law
Origin of Parkinson's law
Word Origin for Parkinson's law
1955 (in the "Economist" of Nov. 19), named for its deviser, British historian and journalist Cyril Northcote Parkinson (1909-1993): "work expands to fill the time available for its completion."
A law propounded by the twentieth-century British scholar C. Northcote Parkinson. It states, “Work expands to fill the time available for its completion.”