What does work is joining a civi airline and earning normal airline wage, keep the RAF pension and then join the RAuxAF as well. These guys get a daily rate for the time they put in, and if you complete your 12 days training and 15 day annual camp per year you get a nice tax free bounty (about £1500) No loss of pension with this.
RAuxAF aircrew are all over the place these days and you decide when you come in to do your bit and when you can't. If you get mobilised (bound to happen) the RAF has to pay you the same as your civi employer does, and you keep your job safe under the Reserve Forces Act.
Then if after some years in civi street, you want an easy life, take early retirement, the civi company pension and the gratuity and go FTRS. By that time the pay rates will have moved forward, and you will find that what the RAF is on today is more than what you were on in your day, even if you add the pension in to the calculation, so you won't loose your pension then either.