There can be no disputing the imperative of universal health care. From any statistical, ethical, and strategic analysis, everybody must be in the pool.
Since the whole concept of insurance is based on pooling risk, where risk can be determined it cannot be pooled. With the decoding of the human genome comes the ability to determine risks for many costly ailments.
Some families are predisposed to thyroid problems, some to asthma, some to breast cancer or prostate cancer. Insurance companies will reject those who are likely to be more expensive, needing costly treatments.
Thus risk can be determined for enough numbers of people to mandate universal healthcare-- everybody in the pool. That's the only way we can protect everybody from communicable or budget-busting illnesses. It is the only way we can proceed medically and ethically. Society is built on community, not individualism. Community is the pivotal principle that enables humanity to survive. Therefore, ethically, medically and strategically, everybody must be in the pool. Universal healthcare is an absolute imperative.