Workers comp. laws are already that way, at least they are in my state,(Illinois).
Lose a finger in an industrial accident and it doesn't matter a whit, how much it hurt, they pay by the joint, first joint amputation, a set amount, second and third joints likewise.
No matter how much your back hurts because of that crane that fell on you, you get compensated for "loss of use", determined by the company doctor, your doctor and if necessary, a third, "neutral doctor. It's pretty much cut and dried.
No, you cannot "sue your employer" for an on the job injury, no matter if either you or the employer is 100% negligent, that's what workers comp is for, similar to "no fault" insurance.
I lost a finger, to the first joint back in the early 70s. The company doctor offered me 100% loss of use of the finger, I grabbed it, along with $7,500. That was a long time ago, I doubt that they are that generous any more.
Sounds like danegeld. Interesting.