Deterrence
The PM is proposing some new laws to prevent terrorism in Australia, including sticking up surveillance cameras everywhere like they have in England, increased powers of arrest and detention, jail time for incitement, and fines or jail for leaving your bag somewhere. Other than the obvious decrease in overall civil liberties, which is especially worrying in the case of the arrest and detention proposals, I don’t think the cameras are an effective deterrent – they’re more likely to serve an investigatory purpose after the fact than to provide any particular utility beforehand – and the new luggage laws are, as Kim Beazley points out, ineffective – more likely to snare some harried family member trying to shepherd the kids through to the boarding area than anyone intent on wiring themselves up as a bomb. The net effect of these laws will mean more harassment of ordinary citizens and less interruption of business operations at airports and railway stations.

So it’s a jobs program. No, really: you'll need operators behind those cameras, first of all, then more lawyers for all the arrested citizens, more guards to cover the shifts for the longer detention periods - not to mention the increased handling requirements will mean building programs for more jails and a volume-based increase for service providers to law enforcement - and the airlines and railways will be able to handle more traffic because they're not so frequently disrupted by having to address lost luggage problems. The benefit to the economy will be immense, especially once the labor law changes go into effect and employee turnover goes into hyperdrive.