Retarded Expression of the Week

"Who died and made you boss?"

Why is it that someone has to die for this expression to work? Seems a bit extreme to me. In fact, it's not even very realistic. When was the last time you got a promotion because someone croaked? Wouldn't it just be more sensible to say something more practical and realistic like:

"Who's been found expendable to the parent company's directive during a time of fluctuating market instability, corporate restructuring and downsizing and were therefore unfortunately and ill-timely laid off only to be overqualified, underachieving and too old to do anything else...and made you boss?"