Obamacare was sold as a way to help poor people and sick people get health insurance, but, as the D.C. decision shows, the actual intent of the law is the abolition of health insurance. The notion of insuring a preexisting condition is an oxymoron; insurance is by nature concerned with that which may happen in the future rather than with that which already has happened. In very large groups, human health outcomes are predictable with a fair degree of precision: Given 10 million people, actuaries can make pretty accurate predictions about how many people are going to get lung cancer and how many are going to be in car accidents. Some factors are relevant to some conditions: Being 17 years old and getting in a car accident, for example, or smoking and heart disease, emphysema, cancer, etc. Insurance, which places a price on calculated risks, will take some of those factors into account. But you cannot in any meaningful sense insure somebody against cancer when they already have cancer.

Obamacare is designed to destroy the insurance market. Markets do not function without prices, and Obamacare ensures that prices will not be allowed to emerge. There is a medical price associated with smoking, but the District of Columbia has decided to suppress that price by law. Pretending that smoking has no relationship with health-care costs does not make it so — it is only a way to push costs around in a way that is agreeable to the likes of Barack Obama, converting a system that prices risk into a system of entitlements.