work expands so as to fill the time available for its completion
Parkinson's Law could be more generalized still as: "The demand upon a resource always expands to match the supply of the resource." (Ref.)
Berglas's corollary: "no amount of automation will have any significant effect on the size or efficiency of a bureaucracy" (Anthony Berglas)
Law of triviality: "The Law of Triviality... briefly stated, it means that the time spent on any item of the agenda will be in inverse proportion to the sum involved."
"An official wants to multiply subordinates, not rivals. Officials make work for each other"
the Economist: Parkinson's Law
Peter Klimek, Rudolf Hanel , Stefan Thurner: Parkinson’s Law Quantified: Three Investigations on Bureaucratic Inefficiency, arXiv
Genaro J. Gutierrez and Panagiotis Kouvelis: Parkinson's Law and Its Implications for Project Management, JSTOR
TGS Parkinson's Law (website)
Trond Andresen: «Parkinsons lov» i vår tid, TrønderRød, 2023-08-25