Last August, as conservatives barnstormed the country seeking to build support for a cockamamie plan to shut down the U.S. federal government unless Congress voted to repeal the Affordable Care Act, Ted Cruz, the Texas Republican senator, said something surprisingly prescient about the president’s signature health-care law. “President Obama wants to get as many Americans addicted to the subsidies because he knows that in modern times, no major entitlement has ever been implemented and then unwound,” he said. The worry, according to Cruz, was that once the ACA went into effect, we’d all be “addicted to the sugar.” Then, it...