scrap the whole defence system (would save zillions) & put up a really really really high fence around the whole country to keep out the 'tea towel heads 'etc. Signs can be placed on that high fence saying "keep out, or trespasers will be forced to watch a thousand TV eposodes of 'Home & Away'in a row
As for aerial attacks? well if it's Syd their going to attack then they'll have to hold like everyone else !
All just a joke but so is the new Govt, the rot is starting!
CW