Why don't big insurance companies crack down on anti-vaxxers?

They are clearly the lynchpin in ending this pandemic. One thing people everywhere understand is money, and if insurance companies like Humana, Aetna, UHC, Anthem, Kaiser, etc., start either denying coverage to unvaccinated people and/or doubling or tripling their insurance rates, they have true financial incentive to get vaccinated.

I betcha if employers start telling employees that their health coverage will be double or triple the amount they're paying now, you'll see a lot of jabbing going on!

The Biden admin needs to huddle with big insurance and put an end to this non-sense once and for all! The insurance companies need to become evil again with regard to covid.