For some reason people on the left think if only the government was more involved, this time it would work to rein in powerful people instead of making them more powerful like the last 97 times.
Politicians want a powerful state because their power derives from their influence over that state. They want their power to grow because no one is ever satisfied with what they have.
If the US has a Serratta, it would be in the impossibility of doing business without managing political relations, and thus the exclusion of people with serious interests from any serious effort to reform the state. I'm not sure we're there yet, but if we aren't we're dangerously close.
There's no us and them. It's all just us.
Pretty much every business sector demonstrates massive economics of scale, and once you get $10billion+ companies, you're kind of damned if you do and damned if you don't. If the government doesn't step in, those huge companies band together to screw regular people (see, e.g., tech companies colluding to keep engineer salaries down through). If the government does step in, those huge companies co-opt it through lobbying.
I think the solution may be a smaller government that is more aggressive about enforcement. Make it extremely difficult to grow companies larger than say $1 billion. Be much more aggressive about breaking up burgeoning monopolies instead of waiting until they get too powerful.
The title of the article should be "Government and it's role in causing wealth disparity".