Single Payer would go a long way towards making our healthcare system non-excludable and non-rivalrous. What we have, the MIDDLEMEN which the post complains about, are rent seekers.
Excludable = you can exclude people from benefiting from it. (E.g., Fixing global warming is not excludable while temperature control in your own house is.)
Rivalrous = more people getting it leads to less for others. (E.g., Software is not rivalrous, but hardware is.)