I wanted to shed a little light on this from how my hospital works. My unit has a general budget from which everything comes out of, meaning supplies and staffing. Save on, more for the other. At least here, more supplies are billed to the unit, not the patient.

A couple years ago they showed us the breakdown of supplies and it is mind boggling how wasteful we(nurses/physicians/everyone) are with healthcare supplies. It is easier to grab a role of medipore tape(at $40 per roll) than to check the room first. Well surgeon after surgeon takes a roll in the room for a dressing change and suddenly I have 5 rolls with just a few pieces torn off. To make a long story short, we are now incredibly frugal with supplies but we used that money to have more staff. I never miss an opportunity to share what each supply costs the floor to the new staff. I think it helps us all be mindful.

Protip: If you let a nurse know that you need something and "looked but didn't see it already in the room" you will pretty much get a carte blanche to the supply room.