I would't expect the ownership , the board of directors , to be so stupid that they hire someone who promises to reduce the value of their holding.
But they are human, so stupid is bound to happen now and then.
On the other side , if you were resonsible for hireing a CEO for a ver large company , would you hire a guy right out of school and pay him small?
The prestige and rep of the CEO is a non tangible value for the comany you might feel obliged to hire someone famous and pay him an amount that seems high for the sake of appearances.
These appearances have a real effect on stock price , so you want the choice to look good .