If you don't scrounge, someone else will.
I am a packrat. I pick up just about anything if it looks like something I could use. A few times every year I have to go through the house and get rid of stuff I don't need or haven't used. This is the only thing that keeps me from becoming a hoarder.
If I was mobile, weight and space would be limiting factors. One of the things I miss about sailing is how it forces you to appreciate the value of simplicity and economy of everything on board.
The government couldn't teach scrounging. By definition government is the source of wastefulness. I don't believe it is possible to truly appreciate anything you haven't worked for and government doesn't create anything other than laws and dependents.
Some individuals both in the mil and LE just have a natural talent for scrounging and trading. They are valuable skills that can make you friends as well as enemies.