The word slave was never officially used but essentially yes, Aboriginals were forced to work.

Here is a link to an article about it: [http://www.creativespirits.info/aboriginalculture/economy/stolen-wages] (http://www.creativespirits.info/aboriginalculture/economy/stolen-wages)

No, slavery has never been legal anywhere in Australia. At times activists refer to treatment of workers as being just like slavery, usually because they contract for labor under extremely unfavorable terms or are deprived of their earnings, and this did happen to Australian Aborigines , and to South Sea Islanders in northern Australia however it did not approach legal slavery.

At the time of British settlement in Australia it was not legally possible to be a slave in England, and prior to settlement, Captain Arthur Phillip, on appointment as Governor to the new colony noted in his preparatory memorandum

The laws of this country will of course, be introduced in South Wales, and there is one that I would wish to take place from the moment his Majesty's forces take possession of the country: That there can be no slavery in a free land, and consequently no slaves" .