Same idea as the U.S.military. Spend every nickel of appropriations, or you cannot justify receiving that amount or more, next year. It’s why the price they pay for toilet seats, etc., is astronomical.
It wasn't a "toilet seat" in the household sense. Someone thought they'd just write a story based on the description on a line number for a military list of equipment.
The reality was quite different, and we've all been lied to about it.