Australia leads the way in partly removing LAGs ban, but why is it not happening globally?

One of the greatest irritations to air travellers is the ban on liquids, aerosols and gels (LAGs) that has been in place since shortly after the thwarted 2006 attempt to explode liquid bombs on board a series of aircraft departing the UK on trans-Atlantic routes. Now Australia is set to end the 100ml limit but only in a halfway measure that will permit LAGs over 100ml in sealed bags purchased within the airport and initially only in international transit lounges.

Effective 01-Jul-2012, airports plan to end for only transfer passengers the 100ml limit for LAGs carried on board flights following the adoption of new security equipment deemed able to detect liquid explosives. Only liquids bought in sealed bags at other airports' duty free shops will be exempt from the limit initially, with plans for the exemption to be extended from Apr-2013, when it is lifted in the US and Europe. Australia will reportedly be the first country globally to lift the LAGs ban. Australia's transfer security screening is separate from main terminal screening, making the changed rule relatively easy to implement. The Federal Government is contributing AUD28.5 million (USD29.5 million) to help airports phase in the new technology.