If a corporate board of directors could buy a $1,000 computer that could do what a CEO does, it wouldn't pay him millions of dollars. If an NFL owner could hire a computer to make decisions that star quarterbacks make, why would he pay some of these guys yearly compensation packages worth more than $10 million? If just anybody could have played the lead role in "The Da Vinci Code" and have it earn $758 million at the box office, why would the film's producers have paid Tom Hanks $74 million?
There's another important issue: If one company has an effective CEO or a team has a star quarterback, it is not the only company or team that would like to have him on the payroll. In order to keep him, he must be paid enough so that he can't be lured elsewhere.
You say, "Williams, what about those golden parachutes for failing CEOs?" Paying a failed CEO, or a spouse in the case of marriage, enough money to go away quietly might be much cheaper than litigation.