I'm not claiming that it is what's happening in teaching right now, mind you. I'm just claiming that it's certainly possible. I've certainly seen the idea happen elsewhere (it's how I came to realize that).

I will say that the statement relies on the assumption that honest folks cannot get a perfect score consistently. Although, even then, if one person always gets a perfect and the other person goofs up rarely and the business has to lay one of the two off, guess what usually happens?