Chemerinsky, dean and professor of law at the University of California, Irvine School of Law, rebuts claims that Congress' health care reform proposals that include a mandate for people to buy health insurance are constitutionally suspect.
Congress, Chemerinsky maintains, has constitutional authority, such as its powers to regulate commerce and to tax and spend that allow it to require people to buy health insurance.
Under an unbroken line of precedents stretching back 70 years, Congress has the power to regulate activities that, taken cumulatively, have a substantial effect on interstate commerce. People not purchasing health insurance unquestionably has this effect.
There is a substantial likelihood that everyone will need medical care at some point. A person with a communicable disease will be treated whether or not he or she is insured. A person in an automobile accident will be rushed to the hospital for treatment, whether or not he or she insured. Congress would simply be requiring everyone to be insured to cover their potential costs to the system.
Regarding Congress' constitutional power to tax and spend Chemerinksy notes:
Congress can require the purchase of health insurance and then tax those who do not do so in order to pay their costs to the system. This is similar to Social Security taxes, which everyone pays to cover the costs of the Social Security system. Since the 1930s, the Supreme Court has accorded Congress broad powers to tax and spend for the general welfare and has left it to Congress to determine this.