Its just a load of political BS, that is the way things are now. Political correctness over ruling common sense. Like with the Coal seam mining (Frac), they're commencing an assessment to determine if the process is detrimental to the environment when there is already overwhelming evidence of the damage it does.
The government wants to appear that it is doing something to appease the people so that when asked what is being done they have an answer. Even if that answer is an absolute ridiculous waste of money. Not only does their plan to implement a barrier cost a huge amount of money (16 mill), it will then cost a great deal of money to maintain that barrier....the stepped up aerial patrols only cover the summer period which historically is not the problem time for great whites which according to "experts" follow whale migration which is not over summer. However the problem here is not only great whites.
Research has shown that previous beliefs of sharks constantly migrating is not true & arguments have been made that removing sharks hanging around is a waste of time because it was previously thought that they did not. Clearly this is no longer true & great whites are obviously no longer endangered either.
For me the answer is simple. Bull sharks are not protected, so there is nothing stopping people from trying to remove the big ones hanging close to shore. Great whites remain protected & this needs to be assessed. They were originally protected based on fisherman reporting they were not seeing them as often. The fisherman were listened to then, why are they not being listened to now

We need to ask why are great whites protected now

Just cull a few of the big buggers hanging around & hopefully the death scent will send the others away. Surely trialling this would make far more sense, cost far less money & have far greater coverage than just a few select beaches.