How about Australia insist on issuing ASIC Cards for all foreign aircrew that operate into Australia?
And then the USA can issue their equivalent card for entry into the States. And the UK can do the same, and so on?
Each aircrew person could accumulate as many cards as necessary for each of the foreign countries into which they operate, and merely change to the appropriate card on arrival?
Everyone would be happy and security would be most certainly assurred.
There is absolutely no way a terrorist could defeat such a wonderful system?