I wrote yesterday that I didn’t think the growing income income inequality gap was a particularly potent campaign issue (though I do agree it’s a damaging trend.) Today, Huffington Post publishes a map above and article that I think proves the point. Around here, it doesn’t take great riches to achieve happiness.

The idea was to find an income “happiness benchmark.” This research describes it as the point at which, despite more income, day to day emotional well-being doesn’t appreciably increase.

Arkansas ranks on the low end, with a happiness benchmark of $69,375 in annual household income. “Life evaluation” can increase with more money, the researchers say, but that’s separate from emotional contentment. Other factors — family, debt — can affect day to day happiness, too.

We know from the Kochs that even billions aren’t enough for some. But the research seems to say that’s their problem.