In this video Roderick Long makes the claim that many libertarians buy into the corporatist world view. He explains that (some) liberals and libertarians have more in common than they think, and that libertarians often go wrong when talking to liberals. I highly recommend it for both liberals and libertarians.
It includes this great quote from Murray Rothbard on big business:
“For some time I have come to the conclusion that the grave deficiency in the current output and thinking of our libertarians and ‘classical liberals’ is an enormous blind spot when it comes to big business. There is a tendency to worship Big Business per se… and a corollary tendency to fail to realize that while big business would indeed merit praise if they won that bigness on the purely free market, that in the contemporary world of total neo-mercantilism and what is essentially a neo-fascist ‘corporate state,’ bigness is a priori highly suspect, because Big Business most likely got that way through an intricate and decisive network of subsidies, privileges, and direct and indirect grants of monopoly protection.”