This already happens to a degree: some companies will offer discounts on your insurance if you follow a healthy lifestyle such as maintaining a certain weight, working out regularly, not smoking etc. So that means those who engage in those activities are penalized with higher benefits costs from their employer because they increase the group premium. It’s the same thing with Covid vaccines, but on a bigger scale. It’s not a new ploy, but the consequences have definitely been ramped up.
Shouldn't the desired behavior actually work though?
If that is the metric forget Covid vaccines.