its pretty clear why the UFC want to keep pay as low as possible, as much as people like to bang on about fighter pay, when you give people a large amount of money, their desire to keep training and work there assess off greatly diminishes, especially in combat sports
just look at McGregor as an example, as soon as he started to make stupid amounts of money, his whole life went off the rails, he has fought about 5 times in 7 years and half of those have been losses, he certainly isnt the hungry fighter he once was, and the UFC understand that