Sign young aircrew up for 20-25 years and not pay £100,000 retenson bonus.
Isn't it retention? 
But yes, agreed.
Allow NCO Pilots and Navs.
Don't really see how this saves money - the pay is the same, trg costs must be there or thereabouts the same... If anything, writing the paperwork for it is going to be a pain in the backside and cost money, then you'd need to build more Sgts' Messes to cope?
Get rid of flying pay if you elect to take a ground job or are not able to fly.
Isn't that the current case? IIRC if you volunteer for a second desk job after being stitched for one, you lose the money - and same if you are perma-downgraded?
Reduce the number of deployable HQs, and EAWs that do not acually go anywhere.
Yep, fully agree - looks great on paper, pointless in reality in my experience.
Perhaps the 100 year experiment should end soon. Perhaps the RAF the worlds first independant Air Force should be the first to dispand.
Disband? Guess you're in the AAC or the 'boat people'? Again, surely this will COST money in the short-term, and I'm not sure if it saves money in the long term.
Crack on