The fact that millions of Americans do not have health insurance is said to be a major problem, if not the major problem, of the U.S. health care system. Estimates of the number who are uninsured vary widely. There are also widely different indicators of how much uninsurance makes. Proposed solutions range from single-payer national health insurance to individual or employer mandates to tax subsidies for the purchase of private insurance. In an essay for Thoracic Surgery Clinics, John Goodman discusses the nature of the problem and possible solutions.
http://www.ncpa.org/email/book-article.pdf