Policy changes can ease the transition to a tech-driven economy.Being too early is a lot like being wrong. And for 40 years, the Left has been dead wrong in its Dickensian depiction of America as a nation suffering a “hollowed-out” middle class while the super-rich greedily grab all the income gains and heartless CEOs ship jobs to China. But where have been the decades of protests and riots? And why did America keep electing centrist- to center-right presidents? Even Barack Obama ran in 2008 as more Clintonian technocrat than Great Liberal Equalizer. The answer is that the data don’t back...