It really is the fault of us citizens that we've allowed our government to grow so large and unaccountable. More accurately, we've allowed it to grow far outside its constitutional limits. And we accept this and deem it necessary. In fact, some of us still think it needs to be bigger to protect us from calamities like the housing crisis! Yet we don't realize that it was precisely the largeness of the government and its influence on the market and money that caused the crisis.
All of this really does have its roots in the Great Depression. At the time, people blamed the crash on capitalism when the real causes were anything but, and as a result people were more than willing to let the government become bigger so it could 'protect' them. It's unfortunate that we the people were, and still are, so shortsighted.
On a side note, robber barons are largely a myth. As well, blaming the fall of the middle class on globalization and technology is simply absurd; how would we afford iPhones and all of the miracles of modern technology without globalization and.. technology? You can't look only at one side of the equation (jobs moving to China) without considering the other (much cheaper products). While it may hurt certain workers when some kinds of labor leaving the U.S., consumers as a whole benefit. Not to mention that people elsewhere on the globe benefit from these jobs.