Once money is allocated, it's often the Executive branch that is given wide discretion with regard to how to spend it. Congress doesn't tell DoD exactly how many boxes of ammo to buy and carve out a specific budget for muffins at conference meetings. We have billion-dollar slush funds all over Washington from money left over from efforts Congress funded - example: >$100 billion of COVID relief funding under the CARES Act still hasn't been spent.
Civics 101 - Who controls the federal purse?
Once money is allocated, it's often the Executive branch that is given wide discretion with regard to how to spend it. Congress doesn't tell DoD exactly how many boxes of ammo to buy and carve out a specific budget for muffins at conference meetings. We have billion-dollar slush funds all over Washington from money left over from efforts Congress funded - example: >$100 billion of COVID relief funding under the CARES Act still hasn't been spent.