We need to remember that my wife is not yet an Australian resident. I'm not sure I can even include her in any superannuation.
She may be able to personally contribute (or you on her behalf) - you need to consider information about non-residents contributing to super, like this article:
Superannuation for Non-Residents | Exfin - The Australian Expatriate's Gateway
"Contributions to Superannuation
Non-residents can continue to make superannuation contributions to superannuation funds in Australia; the rules regarding eligibility to make these contributions in Australia apply equally to residents and non-residents. You should, however,
not make contributions whilst non-resident to a self managed superannuation in the absence of professional advice.
Under changes announced by the Government in 2007, you also do not need to be working to contribute to superannuation if you are under age 65.
Generally, it is viable and appropriate to make further contributions to Australian superannuation if your objective is to eventually retire in Australia, or if the taxation on Australian superannuation is more attractive than the country of residence. This is where taxing rights and double tax treaty arrangements may have a major impact. For example, as long as withholding taxes, or other costs, are not too significant it may be better for you to make tax effective contributions into your local pension fund which you later withdraw and transfer to Australia. There are forex risks associated with this approach, and you need to be mindful of limits on non-concessional contributions into superannuation.
Note, however, that some superannuation funds require that members are residents"
Superannuation is also a concept that my wife does not understand. She is not even remotely interested when I discuss it with her.
Superannuation is merely another investment structure to hold assets where access is deferred until a defined event (death or total & permanent disablement) or retirement of the individual once they have reached preservation age. There is also restricted access in limited other events like severe financial hardship, compassionate grounds or terminal medical condition.
Getting your super | ASIC's MoneySmart
This structure that may be more tax effective than other investment structures, dependent on the persons circumstances.