Not according to my students it isn’t. They are confident they will get a fair hearing if they want one – they have three separate rights of appeal. Only one of those people needs to veto a caning and it’s vetoed. That’s it. Done. And two of those people explicitly have the child’s welfare as their number one priority.
But if you want an independent appeals process, I’d have no problem with that personally – and if the lack of one is the problem, rather than abolish corporal punishment, then one should be set up. Because if the system is unfair, it will be unfair whatever punishment is in use.