I agree with the first caller. You can't demand money fights unless you are a big draw, but title holders should automatically be paid very well for having risen to the top. The UFC should step up, invest in, and pay their champions well, whatever their drawing power. It's simply a matter of respect for the champion of their brand.
Also, I think that fighters demanding big paydays before anything else lose fans and drawing power by default. Stripping a character's motivation of factors like pride to be the best, wanting to be considered the greatest of all time, etc--if you lack these narratives, then you are not following someone on a quest. There is no story, nothing to root for in that fighter, IMHO.