Folly and a farce
Dear Minister. Your airport security is a farce because
1) You are a Politician - a complete tool who knows nothing about Aviation
2) Any idiot could drive through any of the large airports chain wire perimeter fences and park a vehicle loaded with the bad stuff under the wing of a large jet before the security guards have woken up or the ADF have left the comfort of their coffee room and television programs to investigate
3) All the larger AUS airports within your 'portfolio' sit next to the ocean where inbound jets fly a few hundred feet above trawler masts, easy pickings for any fruitloop who can rustle up a SAM from somewhere.
'Safe skies NOT,for all'