Seriously, employer provided group health insurance has been a disaster. Instead of propping it up, even more, with government, let it pass. Find something better. Just don't force everyone else to play along with your preferred solution.
I don't know where you get that. Perhaps you are not old enough or knowledgeable enough to know that the employer-based insurance was THE best healthcare in the world...that is...before corporatism ruined it like they have ruined a great many things that use to be good.
The problem today is rising cost, with the "rise" primarily being cost of insurance. Actual medical cost for most conditions have been going down, not up.
The biggest problem in America is horrific eating habits. Child Diabetes type 2 for instance, didn't even exist a few decades ago.
Obesity is magnificently expensive. Food related illnesses, primarily diabetes and heart disease, eats up 67% of all healthcare costs in America according to a study.
The sickest 5% of this country account for over half of the TOTAL U.S. healthcare dollars spent!!
Yet....preventative care and nutritional education is virtually non-existent. Most of the attention is diets that don't work. And will never work.
Truth is, if Americans stopped the cheeseburgers and ate a few more salads, turned down the ice cream and cake and chose a few more fruits instead - healthcare cost would drop by nearly half.