Joe Conason: “From the Tea Parties to the corporate boardrooms to the presidential debate platforms, we hear a familiar droning whine about taxes — except the angry message is no longer simply that taxes are too high. Today, conservative politicians and pundits complain instead that some people, namely those too poor to owe federal income taxes, aren’t paying enough. So what if those people can scarcely sustain their families, like the millions of middle-class families doing slightly better but struggling as well?”