Hate to pull the old "one chart" trick on everybody, but in this case, it sticks.
Industries that pay what many people would consider middle income wages ($45,000 to $70,000 per year) have shed more than 30,000 jobs in the past five years in Minnesota, while industries that pay less than $45,000 per year have gained more than 30,000 jobs over the same period.
Interestingly, the state has added more than 10,000 jobs in industries that pay more than $70,000 per year.

This is a nice local addendum to the latest Survey of Consumer Finances from the Federal Reserve, which shows that real wages are either sinking or stagnant for most Americans.
The report is a dreary chronicle of something that more and more Americans are feeling. Quality jobs with good wages are becoming more scarce, and the poor are falling further behind.
"Families at the bottom of the income distribution saw continued substantial declines in average real incomes between 2010 and 2013, continuing the trend observed between the 2007 and 2010 surveys," the Fed report says.
Families in the middle to upper middle part of the national income distribution (between the 40th and 90th percentile) saw no gains in real income from 2010 to 2013, meaning they have not recovered their losses from the recession.
"Only families at the very top of the income distribution saw widespread income gains between 2010 and 2013," the report said, and even for them, real income is below 2007 levels.