Well, these mega corps are the results of flim flam government regulation and tax law. There is a reason why the big American banks are so much larger then other nations big banks. Regulation and tax law, pure and simple. Unlike governments, businesses, even corrupt crony big businesses have to follow the bottom line. Even big business stacking the deck towards themselves have unintended consequences that even they don't see.
It results in mergers and buyouts. And these huge monster companies that would never otherwise be. Its not the market at work by any means, though liberals will use it as examples of the "failure" of markets putting much wealth in the hands of a few. The truth is, that it is an example of not allowing the market to do its work.
These mega companies are playing with fire, as the government, at the end, is making the "rules". They will regret it someday. They get big and lazy, then become about as flexible as a government agency. Until of course some politician makes it a government agency when these companies will someday be "nationalized". That is the end result "progressive" politicians want. How many people like big companies? That's right, nobody. And the masses will cheer when that "justice" happens. Never mind that government will lose that wealth faster then you can read these words.
The irony of Barry's speech at Mandela's funeral the other day, is that his policies of his regime are creating what he spoke against. He just wants the wealth at the disposal of people like him, rather then the "evil" businessmen that created it.
Big businesses are becoming the dupes of the progressives.
At least at the moment, those big companies, at minimum do the public some good. They do provide some decent services and products, something the government could never do.
But the danger is the actions of big government. Of course most miss the truth and take in the evil business line provided by the astro turfing government.