Harrowing, sad, and infuriating. Another quote from the same piece: "If you buy a BMW built in Alabama, or a Toyota built in Mississippi, you’re not helping the American labor movement."
My family has been helped by progressivism (my Italian-Catholic ancestors in MO had their funeral parlor burned down, probably by KKK sympathizers) and the Labor Movement. My dad walked up the street the day after his 18th birthday and got a union job making $2.41/hr. I would not be where I am today if not for the labor movement, and unions in particular.
I think what people forget is the unions have raised the standard of work for nonunion laborers as well.
It will take me some time to sort out some of the implications of the article. However, one thing that jumps out at me is the text above that I bolded. Considering that in 1953, 35% of workers belong to unions, the difference between an anemic 13.1% and an absolutely dismal 7.2% doesn't seem so great.