I don't think you read the article at all. This has nothing to do about LinkedIn or networking. You have to be seriously deluded to think that LinkedIn or any other social media company, as well as general networking is the way to defeat our massive levels of income inequality. You're essentially telling bootless people to pull up their bootstraps by making friends with executives and managers. It's not that simple, and condensing the problem into what you're talking about is ignorant at best.