Dr Dao - a doctor with patients to serve the next day - was "selected" by United Airlines to be removed from an overbooked plane.
As he had patients to tend the next day he did not think he should leave the plane. So the airline sent thugs to bash him up and forcibly removed him.
They apologised after what Tepper and Hearn think was true public revolt, but what I think was more likely the realistic threat to ban United Airlines from China because of the racial undertones underlying that incident.
The reason the authors assert was that United has so much market power you have no choice to fly them anyway - and by demonstrating they had the power to kick your teeth in they also demonstrated that they had the power to raise prices. The stock went up pretty sharply in the end.
Walmart for years used to talk in their conference calls about all the cost savings they were implementing. And analysts would want to put those cost savings into their model as earnings. Walmart would disabuse you of this. Cost savings are passed to customers.
The solution to the problem in capitalism according to the authors is more capitalism. They want more entrepreneurism, less barriers to entry in companies but also they want regulators to view skeptically (and stop) anti-competitive mergers. They endorse measures against tech companies that stop them leveraging monopolies on one sector into monopolies in another sector. They would have endorsed the break-up of Microsoft into an operating system company and an applications company.
Except that buying potatoes cutting them into french fries, par cooking them, freezing them and distributing them to fast-food chains is valued more highly by the market. (Again my measure is EV to sales but this is true by most measures...)
And it is pretty clear that they are right. French fries is a super-profitable business.
Tepper and Hearn would argue that the oligopoly is used to suppress payments to suppliers - and the main supplier here are Idaho farmers. Usually they would be pretty good at lobbying. But there is another possibility - which is that the oligopoly is super-strong - and some of the excess profits are used to pay over-market prices to the farmers and maybe the farmers have (in their own interest) chosen to lock up the industry with regulation (and lobbying).