The remunerated PPL/FI would also re-open the door to chaps with vast instructional experience but who now, thanks purely to anno domini, are limited to holding NPPLs.
Why should they not be permitted to be at least CRI(SPA)s or, in cases such as yours Trapper69, CREs?
Regarding stalling/spinning, you have only to read the utter twaddle posted by some on other threads to see how poorly that is taught these days. But most PPL holders never get close to the stall on their own - indeed it is hard enought to get them to fly at VAPP rather than VAPP + 20 on the final approach..... Where they do seem to get themselves into trouble is with airspace violations. Which brings me to the conclusion that too many FIs have not been teaching navigation correctly - or accepting that they should be capable of giving some elementary GPS instruction to PPL holders.