Here's a question though (can vary by country and racing industry), how do the winnings from racing (as a distribution) compare to the earnings from pedigree breeding, stud fees, sperm straw sales, etc.?
I agree there's room for disruption, just as there is from (say) the iron grip of the US Home Owners Associations and other cartels, but expect a lot of regulatory push back from the insiders.
The, ah, American Quarter Horse Association won't let any old nag run if they can help it.
Money would count, but I dare say it'd need a bit of crafty social engineering running in parallel to crack in.
Caveat: I'm not a horse racing / polo insider - I did some contract work years back and rubbed shoulders with a bunch of millionaire horsey types.