The day of reckoning for President Obama’s lawless rollout of Obamacare finally will arrive this week when the Supreme Court hears oral arguments in King v. Burwell. Americans who are interested in the rule of law should hope that when the SCOTUS hands down its decision–most likely on the very last day of the term this June–it will rule to enforce the law that was actually written, not the law the IRS wishes had been written. But those like me who are interested in good health policy are looking forward to an important side-benefit of such a principled decision. It finally may give us a crude market test for a poorly conceived and badly marketed product that so far has survived only because it has a federally enforced monopoly behind it.