Typically I am rather skeptical when a solution that works in other countries is proposed for US. Scale matters and something that works nicely, for example, in Norway (population of 5e6) may lead to very bad results when the population is 320e6. But Spain is sufficiently big with population of 46e6 so some extrapolations are possible.<p>Also, as far as I know to get access to the government-run healthcare in Spain one still needs an insurance. But its cost is just about 100USD/month per adult even for foreigners that live in Spain on private money and anybody with work is covered through taxes.