A shark fishing industry, to harvest its oil, was once very active in this country.
And killing them with shot gun cartridges on the head of spear guns was done as a sport.
Less fish, a product of over fishing? is driving sharks toward people in the water.
Bit surprising any one has not noted the increase in shark attacks

Some people don't appear to realise that sharks don't think like academics.

Taking lives for sport is not the way sharks do things. Ethics means they only take what they can eat , same as at smorgasbord where you don't pile on the smoked salmon and caviar and just walk away. The same with doggie-bags , any left-overs are collected by other fish , crabs , lobsters and coral if possible although they are a bit fussy.

If there were less people in Australia and less fishing in the world there would be more habitat for Sharks.

CM, I'm afraid I would want to see a damn good plan or explanation as to why there would EVER be a need for more sharks, unless they were to become a greater food source for humanity.
We have been eating shark for decades at the ole' fish-n-chip shop, so looking at it from that perspective, it would also increase the fish stocks at the same time because less sharks to eat the fish stocks.
I had a quick look at the links Toni put up on page 3.
I thought the statement was a little hard to believe, so in reading a couple of the links I find that the 'experts' were referring to localised regions, and not the world as a whole.

They make more room on waves where surfies are breeding too fast.