So "free" comes in many forms, not all single player.
What's broken is the huisarts system where any efforts to get specialized care when you're in pain must pass through your GP. This often leads to a longer waiting period that can be excruciatingly painful for some.
https://h4i.nl/2018/11/30/health-insurance-understanding-eig...
We have a similar idea here in Norway. I pay about 20 euro to visit my GP and I pay for drugs. An MRI costs me about 25 euro. But there is a limit of about 200 euro per year. Anything I pay over that will be refunded in the tax settlement for the year and if I have a chronic need for drugs I will be given a frikort to exempt me from paying for them at the pharmacy.
At that point it's basically an income tax.
Also, food stamps etc are already a thing, and insulin is necessary to, like, live.
Insulin should be free for everyone to produce and to sell, then prices would go down on their own.
Of course, this doesn't mean the USA shouldn't implement "free" healthcare like we have in europe; just that that's not what the insulin problem comes down to.