Weapon system acquisition is largely about transferring money from taxpayers to defense contractors. Actually acquiring weapon systems is not the focus.
I think it's mainly about funding the procurement bureaucracy and maintaining their control.
My brother worked in finance at a big name defense contactor. He said the biggest issue was DOD not settling on a spec, endless change orders, shutting work or a production line down and then paying for it to start again.
Endless waste and mismanagement and zero discipline in the procurement process, as though the procurement process itself and not working weapons systems was the goal.