They used to get mellow on Kava, but I think someone in government cancelled this option.
So they went back to grog, sniffing petrol and pressure-pak cans, and chain-smoking.
(Oops! ... or as Homer would say ... "D'Oh!")
If they were allowed to sell weed they would soon fall foul of the bikie gangs who heavily depend upon sale of this for their club revenue.
Maybe they could grow poppies instead ...?
For the Overseas market?

Maybe to Afghanistan?

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The Poll: I put NO.
In 20 years time, through the government, the taxpayers of Australia would be sued for billions to compensate for 'health problems', suicides, depression, alcoholism, wife-bashing, child-rape, and god-knows-what-else ... all on the excuse that it was the Dope that Done it.
Pro bono lefty lawyers would be all over the Abo camps like fleas on a junk-yard dog. Big Bucks to be made. A bonanza.