Don't forget there's a lot of people who are 'unemployed' but who are on other things like disability pensions etc.
There's a strong motivation for someone on the dole to move to the
DSP (Disability Support Pension) for the higher payments and benefits.
The system encourages those to move to the DSP, in the move they convince themselves that they can't work.
My brother is a classic example. He's mildly disabled, can work maybe half the year. But swapped from the dole to DSP, maybe 5 years ago. In the process he has convinced centrelink, and himself that he can never work again.