Why Does the White Working Class Predominately Vote Republican?

Interesting speculation about why the white working class (WWC) voted Republican by a 30 point margin in the last election:

"So who does the WWC take out its anger on? Largely, the answer is the poor. In particular, the undeserving poor. Liberals may hate this distinction, but it doesn't matter if we hate it. Lots of ordinary people make this distinction as a matter of simple common sense, and the WWC makes it more than any. That's because they're closer to it. For them, the poor aren't merely a set of statistics or a cause to be championed. They're the folks next door who don't do a lick of work but somehow keep getting government checks paid for by their tax dollars. For a lot of members of the WWC, this is personal in a way it just isn't for the kind of people who read this blog."

I wonder how this hypothesis could be tested.