The author make some good points but I don't think the process is "unintentional" so much as natural outgrowth of reality in a controlled or managed economy.
Anyone whose livelihood depends on a business -- as an owner or employee -- has an incentive to protect that livelihood. In a country were the government has the power to make or break a business, political influence quickly becomes an essential part of survival. Those with money have greater access which gives them greater influence. It is only natural for a politician to favor his friends.
More-and-more, modern America is looking like an textbook example of Jerry Pournelle's Iron Law of Bureaucracy. In such a world, survival, means having influence over the bureaucracy or, as someone once said, "If you are not at the table, you are on the menu."