Perhaps the NSW government could cut a deal with Elon Musk to supply a quantity of his Flamethrowers to farmers battling the infestation.
https://www.theverge.com/tldr/2018/1...ethrower-price
At $500 USD a piece, it is cheap by farm equipment standards, and would not poison the native predators. Of course, in the wrong hands, it is incredibly dangerous.
Still if your hay crop is infested, burning it might be an option, as it has no other use if infested. Perhaps it could be a job for the Army.
I imagine a scene from the movie "Fahrenheit 451", where the firemen show up to burn things.
Still Australia's recent bush fire traumas may make this solution too much for even ScoMo to pursue.
Light 'em up Scotty.