The problem is the stewards are terrified of the trainers. They’re afraid they’ll say, “if you won’t let me do what I want, I’ll take my ball and go play somewhere else”. When Olympic athletes are caught juicing, they’re banned worldwide. We need a national body to mete out penalties – not a bunch of racing associations in competition with each other.
I doubt we’ll ever see that though. Lacking that, the only thing we bettors can do is not bet the tracks that let the trainers cheat them. They have to be made to fear the bettors more than the trainers.
The reason they’re so successful in cleaning up their game in Hong Kong is that the stewards are not afraid of trainers, owners or jockeys, but are responsible to the bettors. If a crooked trainer threatens to quit if he is suspended (like Mullins does) they say, “Good riddance, don’t let the door hit you on the ass on your way out. There are dozens of honest horsemen waiting to take your place.”

Bob