50 -50 is the only way and Hattons Lawyer is threatening to sue if Pacs people drag there feet on this
Ricky Hatton threatens Manny Pacquiao with legal action - Telegraph

I don't think for a second that the fighters are at fault here ...more a case of the people handling them keeping their superior marketing status in tact and being able to lay claim to being "The top earner"
Greed is playing a factor in this too.