All fighters involved in a boxing event should divide equally the total ppv money since the undercards are equally important for the events success. The purse guarantee will be enough to compensate their level of status in the boxing world.
At the end of the day though those fighters were offered a sum of money to fight and they accepted it. If they don't like the terms, then some other fighter will step in to take his place. There is a long line of low income boxers looking to make a name for themselves. It's a rough business but most are aware of this when they decide to jump into the world of professional prize fighting.
Thats like saying dont pay tiger woods appearance money at a golf event because he needs the other competitors also. No tiger no event. No Floyd or Manny no PPV.
