They like to give contracts to connected outsiders so that they can take care of their friends and take the blame away. 30 years? quoting the venerable Sir Hump

They like to give contracts to connected outsiders so that they can take care of their friends and take the blame away. 30 years? quoting the venerable Sir Humphrey Appleby: "Precisely. Months of fruitful work. Leading to a mature and responsible conclusion." Since it takes 30 years it must be a responsible piece of software, polished to the bone.