One of the main reasons for Australia having concerns about privacy can be seen in the tragedy that befell an ordinary family in Sydney when they won the Lottery. The tragedy occurred when I was still a school girl, living hundreds and hundreds of miles from Sydney. I am aware that families across the nation basically went from allowing their children to play and roam freely, unsupervised for hours and hours on weekends, school holidays to putting us all behind closed doors, inside, in front of the television, where we could be in eyesight of a responsible adult

or at least 'Big Brother' ....
All my cousins (many living thousands of kilometres away in rural Qld, and the NT), my siblings, our school friends, and over the years since, in conversations with people my husband and I have met, .... if they are our age, or older, they remember "Graeme Thorne". He was eight years old. He was kidnapped on his way to school, and a ransom demand was made, but he was killed before anyone could save him. The kidnapper had found the details of his parents lottery win. School children across the nation learnt not to give out names, addresses.... these became private information.
My parents and their siblings included many senior NSW public servants , and several clergy. May I assure you that they all date the privacy concerns that continue to exist throughout Australian states and territories to that one incident, in the 1960s. Until that time, very little concern for what we could now call privacy or private, or sensitive information about the person.
The massive explosion in population numbers in the 1850s and 1860s far outweighed the numbers of persons transported under sentence of a court of law. The population of the 1850s and 1860s was suffering 'gold fever'....
http://trove.nla.gov.au/newspaper?q= http://trove.nla.gov.au/ndp/del/article/137118246 Canberra Times 12 July 1960
and
https://news.google.com/newspapers?nid=lL5f5cZgq8MC&dat=19600602&printsec=frontpage&hl=en (Page 5, of the Sydney Morning Herald, 2 June 1960)
Cheers, JM