Sevarg - you might find that the modern SAR world in the RAF is quite a lot different to when you left in terms of rearcrew professional knowledge and skills required (even if the displayed level of selflessness and bravery hasn't altered, whether civ, RN or RAF).
ISTR the starting rate for Bristow managed transition for rearcrew was circa £35K with an additional £7K for paramedic qual.
Compare that with a FS or MACr radop on £50-60K or a Lt Cdr Observer on £70K plus and you will quickly see why many very experienced and capable SAR rearcrew have had to stay in.
Also look at other contracts like the Shell Brunei and see how many senior operators have gone that way instead.