In the aviation Industry there is no substitute for a Grade One Instructor.
The current situation exists where arguably hundreds of experienced airline pilots with multi-thousands of hours, some with CASA approved check pilot qualifications, are out of work. As far as CASA is concerned their "prior learning" experience, including instructor time both in the air and simulator, is considered worthless. If they decide to become a flying instructor they start as a junior grade 3 but only after forking out a fortune for the rating. It has always been thus, so nothing new.