Not always an option. In my case, moving closer would quadruple my taxes. Decent neighborhoods are 40 minutes away (average commute in my office is about 40 min).
There's also the question of working spouses and kids.
If it were for a boffo CEO position I'd consider moving but, to be just another seat warmer, not so much.
(disclaimer: I really like my job which is why I drive 2 hours each way. If I can work out moving closer that would be beneficial to all involved I would. I won't get within 30 minutes though - that I already know).