Good article. A point Mr. Ransom missed: thanks to the unions' support of Obamacare and the politicians that inflicted it upon us, more and more people are having to work part time, temp, and contract (job shop). Part timers, temps, and job shoppers are almost impossible to "organize" (i.e. bully into joining a union) because they are constantly mobile changing jobs and locations. The biggest effort of the unions of the last few years has proven their undoing.
High taxes on employers and choking regulations are, of course, also adding to the trend. There are so many examples it makes my head spin.