In the essay's origin from The Age, an Australian newspaper, by the use of a lot of indicators suggest Carter assumes a broader readership. So, the choice of a widely circulated newspaper implies an intent to reach a diverse audience.
Carter is one that employ a tone and language accessible to a general readership rather than assuming specialized knowledge. The topics addressed could transcend local interests, and the language may lack overly specific references.
So, the publication choice and language used tells or provide evidence that Carter envisions engaging with a wider, possibly international, audience beyond the immediate readership of The Age.