Medicare currently spends less than ten thousand dollars per person per year. That is taking care of the retired and disabled. Let everyone in on Medicare. Here is how you do it.
Currently, about one fourth of Medicare spending is through the Medicare Advantage program. In that program the government pays private insurance companies to take over the responsibilities of Medicare. It is a per month payment on a yearly contract. Let everyone in. Let the private companies bid for the contract and compete for the customers. Charge a single, per person, community rated premium. That means, the more young people a company enrolls the lower their cost and the higher their profits. They will, in turn, use some of those profits to lower their bid the next year. It is the very result of "free market" principals the right constantly talk about. It will work, insurance companies will still make money and everyone's cost will go down.