So a bloke who wins a $3000 race at Tamworth, Junee etc ends up with what? A $50 petrol voucher, a hotdog and a can of coke? You'll have blokes pulling them up to get 2nd prize-money and no jump in class!!!
And if, although you didn't say it, you mean return the cost if a swab is clear, well I believe prizemoney is already held until swabs are clear.