Part of the problem is those who wan't to instruct later in their careers who didn't do instructor ratings when they had <200 hours can't justify the huge costs involved. I am simply not able to put $15k+ dollars of my own money into another rating to carry out some part time instructing on the side for the purpose of self satisfaction . I couldn't leave my current employment to become a grade 3 instructor on minimum wage as it simply wouldn't pay the bills.
I would like to see quality training organisations who want quality instructors offer assistance and benefits for guys like myself but it is not going to happen. There is money to be made in these ratings and for the pimply kid off the street on their first lesson the polished up 4 barred grade 3 'professional' with aviators is going to excite them more than the crusty old bloke with a worn out epaulettes from one too many wet seasons, sim sessions and an ability to find their way back from the training area with a D>TO button.