The entire scenario is completely absurd. The only consumer good that is both absolutely vital and has incredibly limited supply is oil. Oil is a nationalized resource and it would be impossible for a single corporation to gain total supply. The U.S. also has the strategic oil reserve just in case.
There is absolutely no motive for why the corporate leadership would want to commit suicide and destroy the united states. Employees work a paycheck, they aren't going to commit treason because their boss asks them to.