Anyone have a link to a reasonable explanation of why the current system will "never go away", which is the line I've heard parroted in the television media?

We have coaches, fans, and even pundits calling for a playoff but apparently it's the AD's that are resistant. I find it hard to believe that nobody can come up with a system that would benefit the schools and conferences financially just as much as the current system does.

Needless to say, I'd love to see an 8-team playoff.