You're skimming the daily clickbait and there's an article extolling the virtues of MyGov and what every dinky-di should know-
https://www.msn.com/en-au/news/australia/mygov-set-for-major-changes-that-every-australian-needs-to-know-about/ar-AA16W9wi
and there's the money quote-
More than 25million Australians have a MyGov account, with 1.4million people using the website everyday and daily usage tripling in the past five years.
Hang about as the population of Oz was 25.5million as of June last year so what's the deal with a MyGov account? Well it's like this-
https://my.gov.au/en/about/terms
To have a myGov account you must be a natural person and have your own email address. An email address can only be used once to create a myGov account.
Being a natural person means you are an individual human being. You are not a corporate entity, robot, or a software program, for example.
Which when you think about it means the Gummint already have all our names and numbers in the one place ready and waiting for each of us to log onto and match up with our central data file. Either that or there's an awful lot of aliases on MyGov just like there are email addresses.