You don’t have to love unions, you don’t have to believe that their policy positions are always right, to recognize that they’re among the few influential players in our political system representing the interests of middle- and working-class Americans, as opposed to the wealthy. Indeed, if America has become more oligarchic and less democratic over the last 30 years — which it has — that’s to an important extent due to the decline of private-sector unions. And now Mr. Walker and his backers are trying to get rid of public-sector unions, too. There’s a bitter irony here. The fiscal crisis in Wisconsin, as in other states, was largely caused by the increasing power of America’s oligarchy. After all, it was superwealthy players, not the general public, who pushed for financial deregulation and thereby set the stage for the economic crisis of 2008-9, a crisis whose aftermath is the main reason for the current budget crunch.