I once brought it to the attention of the previous DAS that there is far too much restricted airspace in Australia and that in the USA, you can pretty much fly over an Air Force Base at 3,500ft without talking to anyone, and you would have thought I had just been caught sleeping with the DAS's wife by the way he reacted!
To the average PPL out there, Restricted airspace is just a no-go area, don't bother trying to ask for a clearance, and there is a Gazillion square miles of the stuff along the east coast alone.
Why is the tops of the Restricted airspace at East Sale FL450? Nothing there flies that high! So why?