Now imagine the money he'd be making/saving if that extra time he spent doing that, he was actually building things.  Carpenter apprentice here, my boss is always careful to recycle, re-use, don't waste, but also says we have to know what the real cost is.  If I spent half an hour saving something worth $2, well, I've just spent $10 in wages to save that $2 thing, so it wasn't really worth it.  