Remarkably, Hollywood bought Congress while being a remarkably small part of the economy, both in terms of revenue (http://en.wikipedia.org/wiki/List_of_companies_by_revenue) and jobs (http://en.wikipedia.org/wiki/List_of_companies_by_employees). These are global lists, but you'll notice that not even Disney makes either one. As an economic matter, why should Congress be more responsive to Disney, Time Warner, and Viacom than to, say, Kroger, which has more employees and revenue than the others combined? The MPAA is visible far more than it is important.
As far as being for sale, publicly owned companies are always for sale.
Look at revenue, not profit. The economy doesn't care how much the company profits, it cares how much the company is spending (on employees and other services).
As far as being for sale, publicly owned companies are always for sale.