Take care

So the credit cards have been doing it for a while and now a car insurance company is doing it...so why can't health insurance companies do it?  If I am fairly healthy and have only had to get the basic check ups for the past year or two, why can't they send me a cash back bonus or reduce my monthly premiums?  I only think it's fair.  If I am sick then I just pay what I normally pay.  If not, then we should be rewarded for taking care of ourselves and getting preventive maintenance work done. Right?  I can't be the only one that thinks this.