The pollies will change the regulations when people can't get their super cheap airfares to places cause airlines can't get people either local or on 457 Visas because the licensing has become too difficult.
It must surely be getting close to the point where it is more viable for a new pilot to go to NZ or the USA and do their training over there and convert it when they get back. If that same pilot is a person with no interest in commercial aviation but owns their own aircraft just keep it on the applicable foreign register, That way you'd only have to comply with Airservices Australia airspace restrictions not CASA regulations.