The Center for American Progress’ Action Fund (CAPAF) looked at the income of the middle 60 percent of households in 2012. Middle-class families in U.S. states with the lowest unionization rates -- North Carolina, Arkansas, South Carolina, Mississippi and Georgia -- all earned below average income, while those in four of the five most unionized states -- Alaska, Hawaii, Washington and Rhode Island -- earned above average incomes.But CAPAF also delved deeper to uncover wider income disparities:
Further illustrating this divide is the gap between the average percent of total state income going to the middle class in the top 10 and bottom 10 most-unionized states. In the top 10 most-unionized states, households in the middle class received 47.4 percent of total state income on average; in the bottom 10 states, households in the middle class received only 46.8 percent. While a difference of 0.6 percentage points may not initially appear large, in 2012, 0.6 percent of Pennsylvania’s aggregate income, for example, would have equaled over $2 billion, or almost $700 per middle-class household.