"Republicans claim to be deeply worried by budget deficits. Indeed, Mr. Ryan has called the deficit an ‘existential threat’ to America. Yet they are insisting that the wealthy — who presumably have as much of a stake as everyone else in the nation’s future — should not be called upon to play any role in warding off that existential threat. Well, that amounts to a demand that a small number of very lucky people be exempted from the social contract that applies to everyone else. And that, in case you’re wondering, is what real class warfare looks like."