Should we investigate movie studios?

I was just reading about the opening of Tom Cruise's Mission: Impossible III, and was struck by the "windfall" that comes to moviemakers . . . the above article states that the first MI movie made perhaps a 100% profit. The current movie opened to disappointing ticket sales, and still the gross sales revenue appears to have matched--in the first weekend on screens, and long before going to DVD, the cost of making the movie. Why aren't we threatening to investigate movie companies' profits?