Why do jockeys stiff horses?

to explain one of your "cheats" the jockey is not swerving the horse to kill momentum. Some horses don't change leads well, so at the top of the stretch they yank on them harder to make them change leads, it appears that they are killing the horses momentum, but it is really kicking them into another gear so they are on a fresh lead coming down the lane. As an owner I know my horses and how they run, if a jock stiffed me he wouldn't be back on the horse again. It would also be fairly unlikely that you would get jockeys stiffing horses at Woodbine where Maidens run for $60,000 and Allowance races go from $66,000-80,000, and Arlington, where they run for $30,000-40,000 the winners share is pretty big and a payoff that large would require a bet equally large which would show throw the handle out of wack, or at least look suspicious. There are 7 riders that are still being suspended because of 3 suspicious bet made last year.