It is a waste.
Even on Dominating with STR 3, you can get an immense amount of money without trying to loot everything, especially with builds that don't use bursting weapons.
Also, one just doesn't need to buy too much stuff anyway, so most of the money in this game remains unused. You occasionally buy weapon frames and armor components. Could get a 170+ super steel plate with a few rolls even without providing the refining data (which increses your chances a lot). That's pretty much it. Everything else can be looted and money just keeps piling up, as there's only one good weapon frame in the shop anyway.
Then you can also get +90 from gear and then some with consumables. You need lightweight expensive stuff. rest you can just break down to repair kits - no point in hauling metal armor or sledgehammers. Pack Rathound just gives you some more money you won't use anyway.
As for Traps, their purpose is to elevate your offense and defense ability. It's not for dealing damage. It's to root people, trigger Ambush (with fire) and Opportunist. You can carpet an area with whatever Frag/HE Traps you harvest everywhere before group fights to trivialize them, but those meant to be spent as you grab them. You should not hoard these. you pick some up, you deploy them within the next fight and use BT/Incendiary/Blob intentionally.
Pack Rathound deprives you from another feat slot that could provide so much more to your character.
