MMA personal contracts bad for sport or good?

There have been a lot of conversations about fighters personal contracts and how it restricts the sport from being as good as it can be. Plus it hurts the fighters because they are not getting paid what they truly should. A boxer will make fifty million a fight at times, and in the UFC they only get paid at tops 800,000 a fight. And there companies take the rest. Its not right MMA is one of the most popular sports in the world now and it been the most rapidly growing sport in America the last few years, and i believe that getting rid of the personal contracts would make it a better sport. It would bring out some great fights such as the Anderson Silva fight vs. Roy Jones J.R., that fight would show once and for all what fighters are really more dominate.