You can't insure the whole country when only a few work to support it. Over half the country receives some government benefit. We borrow over a $trillion ($1,000,000,000,000) every year already. The BIGGEST reason...the medical industry is GREEDY. Everything is just plain too expensive! Doctors/nurses/other medical workers are paid too much. Equipment costs too much. Drugs cost too much. They literally have your life in their hands and they know it...they charge accordingly.