Not saying it would work, but what I’m describing is more bite size than a full health system. So if a group only committed to “everyone gets to see a general practitioner” then people are on their own for MRIs and chemo. Figure out how many patients a type of practitioner can handle in a year, then pool that many people to hire one. Same idea for any other role, like how many cars can one mechanic fix a year?
I’m not married to the idea, but more thinking about how could we take concrete steps towards universal health care, other common services, democratic workplaces. If people see a micro version working then it may inspire more ideas, attract more effort.