What a crazy angle. A bloke paid to hump bricks up onto a roof may not just rack off Ikea if he drops his hod of bricks onto the deck. It maybe a freak accident that wipes out 4 people below, maybe more than a truck crashing. Yet this guy as a labourer is paid X. The guy who sells hamburgers at a fair could be under cooking the things and yet give food poising to tens of people who ate them, possibly death (it's happened!).
You don't just justify wages on what destruction you could cause. On your basis, loadmasters should be on the same as pilots given the destruction they could cause through a mistake, but they aren't. And a lot have flown/are flying around having been up 2 damn days on the trot, being paid on peanuts.