I too find a problem with giganticism among corporations. But I don’t see a corportism taking hold, ie large corporations trying to control our lives.
A very important thing to keep in mind, the larger the government, the larger the corporations. That is the general relation that normally holds true for several reasons. More and more regulation makes it harder to compete profitably with very large economies of scale. Government gets bigger and bigger, and interaction with the government (for example in tax preparation, lobbyists in order to influence government, legal personal to worry about regulatory compliance, etc) costs more and more; hard for the little company to make it work. Finally, as larger and larger portion of the economy becomes government spending, to compete for that portion of the economic pie, one has to be huge, as lowest cost and bidding nightmares on government contracts take hold.
Yes, we would be better off without so many giants out there. But large governments equate to large corporations.