The third issue is that it actually hasn't been announced that this is happen yet. So a lot of energy is being wasted on a non event so far.
Forth issue is that Dubai customs collected the duty last time, not the airline. So the money paid as duty goes to the government. No surprise there.
And pilots should be given a better duty free allowance than the pax down the back. As pilots are better looking, and just great guys/gals. This also seems very obvious.