So far as fixing is concerned, do you not think where there is a mega top favourite of the day running, and the odds on everything else is 5 - 1 up, that it would be an ideal time for jockeys to place the odd bet on others in the field?
Especially the one who is on the favourite!
It is just something I noticed after backing the Big favourites, only to see them fail to get a place, and not even really try on a few occasions.