The NCAA has no legal right to implement a playoff, since it was created by conferences. The Supreme Court even ruled on this a couple of decades ago saying that only the conferences and individual schools, not the NCAA, have a right to negotiate TV and other appearances.
A playoff wouldn't solve anything. You really think that New Mex St. has a "right" to be in a playoff by winning their conference of nobodies over the #2 in the B10 or SEC? So then you say "conference champions + highest polled teams." What about when you have 3 B10 teams winning 10+ games like last year? Someone will get left out while Eastern Michigan gets in with an 8-4 record for winning its conference. Very fair! Yes, and of course we know that the better the conference, the worse record the champion will have. Just look at 8-5 conference champion UCONN of the mighty Big East from last year. Very impressive in losing to Oklahoma 48-20!
The $$$ all comes from the top schools and conferences. When some starts throwing $300 million a year to televise the MAC, then you can start talking about financial equitability. But 90% of the money in cfb is coming from the fans of 50% of the schools, and to try and legislate that they have to share that money with programs that can't even fill half of their 25,000 seat stadium every saturday is Big Government at its absolute worse.
If the non-BCS schools want more money and access, why don't they put together their own BCS-style bowl package, and start shopping that around to ESPN and Fox?