What’s always missing from these calls to action is: what are you replacing it with? There are a number of healthcare programs across the world and every country has a variety of different problems. There are no silver bullets.
If you want a great read about a few different countries, I recommend The Healing of America by T.R. Reid. It has some suggestions, but in general it is great at illustrating how treating the same illness in different countries can be varied in terms of treatment and cost.