Aside from your suggestion in the original post about firing 4 black guys (*facepalm*), what you fail to realize (Mark Henry is hurt currently) those guys are full time and make up the matches in a good majority of their live event shows, Main Event shows, Smackdown shows and the earlier hours of Raw. This is opposed to a guy that shows up very rarely and asks for a lot of money and doesn't like to be around for longer than one night before he catches a flight. I don't know what those guys are getting paid, but they'd might have already been cutting a lot of guys if it was substantial enough to get Brock... right... that probably wouldn't be great for locker morale to randomly fire full timers for a part timer (and I mean very part time) and I doubt they'd have enough shit to fill up however many hours of TV per week and their live events without bringing up wrestlers from NXT and paying them more or putting other people in their shoes.