Worrels has hit the nail on the head. The Federal Government has done one risk assessment for all airports (and other aviation sites) instead of doing a risk assessment for each site. Or a least break it down into different groups of sites - capital cities, regional, bush, etc. It is obvious to all (all with common sense anyway) that the threats at SKSA are different from those at Oodnadatta
Unfortunately, we are dealing with government and bureaucracy and there is very little good old Australian "nouse" in these areas!