The authors of such fiction typically seek to justify their own positions of employment within that community, and possibly within the government entity itself. Axiomatically however, all of them have a stake in the outcome of the requested spending. They will be asked for, and then will present metrics, or a presumed study of return on investment (ROI) and typically the elected leadership falls for it hook, line and sinker.
A perfect example was during a consideration of funding for the MSU extension office in Grand Traverse County when I was an elected commissioner. County commissioners were given plenty of reading materials by the MSU advocates to show us that for every dollar spent we would see a result of $17 in benefit to the county. The calculations as it turned out were premised on a ‘guess,’ that was then multiplied by a compounding analysis program that is used by MSU intellectuals, that relies on ‘guesses’ for the input variables.
Go. State. .. Yay.