>>398770631
He's probably buying +P ammo for his glock without looking at the price (as expensive as FMJ for his AK) and just wasting it like it's nothing. You can be forgiven for that mistake until you actually become poor from it though.
Trying to buy and use less in consumables than you'll make back from the mission reward can show you how expensive shit really is and how frugal you're expected to be in that game.