Centrelink is like the tax office.
If the rules have holes in them, people will exploit those weaknesses.
About 20 years ago, there was a pommie guy where I was 'staff' who somehow managed to qualify for the full dole, special extra dole and the whole cost of his mulit endo + CIR.
They wrote him a blank cheque, so he basically took his time. Unfortunately, he was a completely hopeless student and never finisished the training or did the flight tests.
That money was not available to us because we were just ozzies and weren't
special.