That was where my original comment was headed. In RAA at lease there are big steps to becoming a CFI.
Not certain of the hours now but basically I think it follows something similar to the below.
Instructor
100hours plus PMI plus Instructors course.
Senior Instructor
d. have utilised their instructor rating at an RAAus FTS and satisfied their CFI (or higher approval holder) that they will be capable of carrying out the duties and responsibilities of a Senior Instructor, detailed in Section 1.07; and e. have demonstrated to their CFI the ability to satisfactorily train and correctly assess at least 3 RAAus Student Pilots for their first solo flight; and
RAAus OPERATIONS MANUAL Section 2.09 - 1 ISSUE 7.1 –AUGUST 2016
GROUP A and B
f. Demonstrate to a CFI (or higher approval holder) the ability to give ground and in-flight instruction to persons undertaking training in recreational aeroplanes in the Aeroplane Group for which the rating is sought.
Note: First solo means the first solo flight of a Student Pilot who has never acted as pilot in command under any other Certificate or Licence.
CFI
AERONAUTICAL EXPERIENCE
4. Prior to undertaking an in-flight examination for the issue of a Group A or B Chief Flying Instructor Approval, an applicant must: a. have a minimum of 250 hours logged as a flight instructor in Group A or B recreational aeroplanes; or b. have held a RAAus Instructor Rating, or RAAus Senior Instructor Rating, for a combined period of at least 12 months.
5. If having recognised qualifications from a recognised organisation other than RAAus, the candidate must satisfy the requirements of Section 2.13 Paragraphs 12 and 13 of this manual.