The logic of the Supreme Court ruling upholding the latest challenge to Obamacare is simple: “Congress passed the Affordable Care Act to improve health insurance markets, not destroy them,” writes Chief Justice John Roberts in his 6-3 majority decision in the case of King v. Burwell. “If at all possible, we must interpret the Act in a way that is consistent with the former, and avoids the latter.” This is obviously true — and patently ridiculous. It’s true because of course the goal was to improve markets. It’s absurd because government policies often have the opposite effect of what is...