There are rules for scroungers. Among them. You only steal government property. Never private. You never steal for personal gain. You don’t sell the stuff. You don’t keep it for personal use. You get it for the unit.
If you follow the rules and are caught, your chain of command will give you a slap on the wrist. If you break the rules, they throw the book at you.
You never outright lie. If the Chain of Command wants to know how you got it, or where you got it. After confirming that they really want to know the truth, you tell them. Until that moment you use euphemisms and other terms to communicate the truth without saying it.