NG
The thread is about FRI, not PAS or retention.
I'm sorry, but I thought the "R" in FRI stood for Retention! The fact is that they are all very closely related and you can't talk about one thing without mentioning the other.
It hardly makes sense to offer someone an FRI at age 36 then not offer him PAS at age 38/40. But at the same time to have a large, ageing team of PAS who are not being replaced due to their high cost.