Arum wants Mayweather vs Pacquiao to happen. Any highly influential boxing promoter would. But, like Don King, he likes money more. He realizes that they are the biggest cash cows in the sport and he wants to drain as much $$$ from them as possible before their years catch up to them. Arum and the Boxing industry will make more revenue from multiple monumental fights including Pac or Mayweather than just one mega monumental fight between them. We won't see a May vs Paq until every possible lucrative challenger is wiped out or until they lose.