One thing nearly everybody agrees upon is that the "sequester" is a silly sideshow to the real challenge facing America: unsustainable spending on entitlements. Ironies abound. Democrats, with large support from young people, tend to believe that we must build on the legacy bequeathed to us by the New Deal and the Great Society. Republicans, who marshaled considerable support from older voters in their so-far losing battle against Obamacare, argue that we need to start fresh. Perhaps it's time for both sides to consider an underappreciated fact of American life: The system we are trying to perpetuate was created...