Stephen Moore: “Massachusetts Sen. Elizabeth Warren recently appeared on one of the late night talk shows, beating the class warfare drum and arguing for billions of dollars in new social programs paid for with higher taxes on millionaires and billionaires. In recent years, though, blue states such as California, Illinois, Delaware, Connecticut, Hawaii, Maryland and Minnesota adopted this very strategy, and they raised taxes on their wealthy residents. How did it work out? Almost all of these states lag behind the national average in growth of jobs and incomes. … States are supposed to be laboratories of democracy, right? These laboratories are providing us with concrete evidence that Robin Hood policies don’t help make the poor richer, they make most people poorer. In other words, the blue states have tried the Elizabeth Warren "progressive” agenda and people are voting with their feet by fleeing in droves. The kinds of income redistribution policies that Warren and others endorse can only work by building a Berlin Wall so no one can leave — though I hope I’m not giving them any ideas.“