At a recent White House science fair celebrating inventors, a Girl Scout who helped design a Lego-powered page-turning device asked President Obama what he had ever thought up or prototyped. Stumbling for an answer, he replied: “I came up with things like, you know, health care.” Ah, yes. “Health care.” Remember when the president’s signature ObamaCare health-insurance exchanges were going to be the greatest thing since sliced bread, the remote control, jogger strollers, Siri, the Keurig coffee maker, driverless cars and Legos put together? The miraculous, efficient, cost-saving, innovative 21st-century government-run “marketplaces” were supposed to put the “affordable” in President...