"500 hours in command of Multi-IFR planned flights and then do the META and IF approvals"
We need the new instructors coming through to be good, but that's setting the bar a bit high !
They need to be competent, but we don't expect them to be experts on day 1 - that's why there needs to be a mix of experience and youth in the teaching team - and a genuine commitment from the senior instructors to passing their knowledge and experience on to the next generation.