The ERs should already be doing this: if they have too much toothache cases for one trauma surgeon, they clearly won’t add a second trauma surgeon to the shift,

The ERs should already be doing this: if they have too much toothache cases for one trauma surgeon, they clearly won’t add a second trauma surgeon to the shift, they will add a general practitioner. If the trauma surgeon is not busy putting car crash victims together, he can handle the toothache just fine: he is already getting paid anyway, so it doesn’t make sense to keep him idle.