DC is an A level athlete that is now over the hill. The skill level and overall athleticism in the heavyweight division is so atrociously low, that he can still run roughshod over them.
If DC had an equal skill set at 30 years old - training MMA throughout his 20's - he would absolutely smash the guy he is today.
Jon Jones has two brothers, and both of them are multi-year starters in the NFL. That is without any room for argument, elite genetics. He is an elite athlete. Since he's still in his physical prime, cheating aside, he beat Cormier to sleep.
When someone with elite athletic ability trips and falls into MMA, we call them the greatest of all time. In other sports, guys with that level of athleticism fill the entire ranks.
If the base pay went up in MMA, we would attract heavyweights of an appropriate age, background and athletic ability. We crown 8 new Division I All American heavyweights every single year - where are they?
Teaching high school gym for 45k/year plus benefits, because that is a more reasonable risk -vs- reward than getting 10k show money to get your head punched in.
If the base pay went up, the pool would get deeper literally overnight.