Lookleft,
I am not accusing anybody of anything, I am merely stating a fact if life, particularly for ATC, in the '60's, when I first came across the expression, thanks to a couple of regular drinking mates, who worked in Sydney Center. That was about the time tape recorders became a whole new weapon in the hands of the DCA "enforcers" (if you prefer that expression) to make life miserable for working controllers.
Get down of your high horse, and check your history, the Gestapo were not exclusively concerned with the Jewish population, and I rather suspect you are confusing the Gestapo and the Schutzstaffel aka SS.
Tootle pip!!
PS: Before you lose the view from your high horse, just take another look, I didn't make any reference the Nazi. And I am not Sunfish.