Your links don't really make your point. There are many factors in earning and you must compare the cost of living between the states to generate a meaningful figure. It is somewhat simple to say all of this is caused by unions.
There are many factors involved-historic, tax structure, regulatory structure, etc.

One thing is for certain though:
"As a result of geographic shifts in population uncovered by the 2010 Census, nine congressional seats will move to right-to-work states from forced unionization states. Some winners are Texas, Florida, Arizona, Georgia, and South Carolina, while losers include New York, Ohio, Michigan, Illinois, and New Jersey. Over the past 25 years job growth in right-to-work states has been over twice as high as in unionized states."

Looking at the severe economic drain and population drain from Detroit, Chicago and Pittsburgh further underlines the trend.


More details here on the surge in migration away from certain states and why:http://www.rasmussenreports.com/publ...he_2010_census