The message is that the power of individual corporations needs to be reined in.
First sentence of the article: "Some multinational corporations are now larger and more powerful than individual nation-states."
Later: "You could argue that in the earliest days of capitalism, something like the concept of free enterprise actually existed: firms of various sizes competed, with even the largest dwarfed in both size and influence by most nation states."
Also: "Unions can act as counterweights to the sometimes terrifying power held by management."
"an increasingly small number of ever-expanding corporate conglomerates dominate the labor market"