Congress does not stop the US military from "keeping a database of historical prices, obtaining supplier quotes or identifying commercially similar parts."
Those procedures do not happen because generals retire into cushy barely-show jobs at defense contractors
Congress does not dare force the US military to do any of the above because the US military is a giant pork barrel welfare program for red states, especially the midwestern ones, feeding them endless useless manufacturing work and keeping all their unskilled-labor high school graduates out of unemployment - sending them into the military where they learn some semblance of how to be an adult and some skills
Those procedures do not happen because generals retire into cushy barely-show jobs at defense contractors
Congress does not dare force the US military to do any of the above because the US military is a giant pork barrel welfare program for red states, especially the midwestern ones, feeding them endless useless manufacturing work and keeping all their unskilled-labor high school graduates out of unemployment - sending them into the military where they learn some semblance of how to be an adult and some skills