According to The Economic Policy Institute - As union membership has taken a tumble - the top 10 percent have been getting more wealthy.

Union membership fell to 11.1 percent in 2014, where it remained in 2015.

The share of income going to the top 10 percent, meanwhile, hit 47.2 percent in 2014—only slightly lower than 47.8 percent in 2012, the highest it has been since 1917 (the earliest year data are available).

When union membership was at its peak (33.4 percent in 1945) the share of income going to the top 10 percent was only 32.6 percent.

To boost wages for working people, policymakers need to intentionally tilt power back to working people by strengthening their rights to stand together and negotiate collectively for better wages and benefits, raising and improving labor standards, and achieving persistent low unemployment.