It's not rocket science, plenty of other countries manage to provide healthcare. Just remove the age limit on Medicare.
But won't you think of the administrators at all of these private health insurers that would be out of their cushy jobs? I consulted for a "non-profit" Blue Cross Blue Shield franchise 15 years ago. It was rampant with nepotism and outright incompetence. A good chunk of our health-care "system" is just a giant jobs program.
Yes, and government systems are peak efficiency without the slightest semblance of a jobs program.