I'm no economist and I'm certainly not the brightest bulb in the room, but it seems to me that economic growth must come from excess capital. If you're eating oatmeal three times a day because you have no money you certainly can't start a business or improve your lot in life. If you can't access a loan or the capital necessary to start/improve your circumstances and a substantial part of the middle class are in the same situation then the entire economy is in a tar pit and can't get out. Read "The Mystery of Capital" by Hernando de Soto for more on that. All the regulations and licensing requirements we have today (to say nothing of legal liabilities) have the same effect. In essence, those who Have will continue to pull away due to their ability to diversify and ride out bad times while those who Have Not will be left behind. That gets erroneously ascribed to "The rich get richer and the poor get poorer" as an indictment of capitalism. It's not. It's a symptom of a broken system where an ever-increasing burden gets laid on those who initially (30 years ago) can afford it but over time can't afford it (today). Class warfare simply compounds the problem. The article cited in the OP is partly on target in that its assessment of the effect is correct, but I disagree with the cause simply being inadequate wages.