Un-bloody-believable! As a Sqn Ldr RNZAF Rtd, I just asked my wife [MA Hons] if she'd ever come across this and she said: "In their dreams sunshine". As a Flt Lt RNZAF I filled a UK appointment in ANZUK [Singapore] for two years and for a while lived in a former RAF MQ at Hyde Park gate in Seletar, and can honestly say I never came across any of this rank snobbery. It would have been given short shrift by my wife [3rd generation Kiwi] in any case !
I never lived in RNZAF housing in NZ but I do know they weren't segregated according to rank.