The universal healthcare system in many countries is like they said, a publicly funded and operated insurer. I can look in the government portal and see what each healthcare provider billed to the public system for example. One can also have their private insurance cover services or just pay out of pocket. But copying that part blindly in the USA is doomed to fail because along with the universal coverage, there are also strict regulations on what services can be offered privately, how much can be charged for services and what must be covered by private insurance (a fun example I experienced recently was my private insurance not wanting to cover a certain drug treatment; if one doesn't have insurance, the government will pay 100% for the drugs but if you do, they force the private insurer to cover the cost). All areas where there USA is lacking.