Albeit Virgin's structure is a little too 'cute' imho.
Reportedly the shareholding structure was 'grandfathered' before the foreign airlines bought in when it still was 51% Australian owned.
Albeit - the International airline doesn't seem to have a separate management team, or Board (although it seemingly did initially), it doesn't publish separate financials and given the recent losses in Qantas International, assuming Virgin was the same, it would seem strange that foreign shareholders would make shareholder loans that ultimately support an entity in which they have no interest
And then you have Tiger which obviously previously couldn't fly internationally (being 100% Singapore owned) now operating under this structure.