Earlier quoted context omitted.
in a market the search for profit is the search for more efficiently serving aggregate preferences of consumers. allowing corporations to assume disproportionate control of the political process is almost assuredly a net improvement.
That's clearly false. A really simple example is antitrust legislation - if MS (or any other monopolistic organisation) were able to remove regulation on monopolies, you can be assured that they would, and that the effect on our society would be dramatically negative.
Here's Cato's take on anti-trust: http://www.cato.org/pubs/handbook/hb105-39.html