Bern's appeal is to young, ignorant, idealistic drones with no investment in the system. When you stand to reap all the benefits of a system with none of the costs, who wouldn't support it?
But soon the millennials will graduate from kindergarten and start to understand the "no free lunch" concept. And when they start getting the bill for these magical proposals of Sanders', they'll "Bern out."
And, at that point, it will be too late.
America - Soon to be Europe.