If you bank with St George or Bank SA and are a very large customer, you may qualify for their Private Bank Platinum Visa Card.
You are supposed to have at least $1million in business with the bank, whether that be via deposits and/or loans.
However, if you have a really good relationship with your banker, he may be able to do something for you.
They advertise that it is the rarest credit card in Australia.
It has an annual fee of $225.00.
A great feature for me is that it allows me to have 3 supplementary cards, for my wife and sons.
It has a 1pt per $1 spent, which converts 1pt to 1QF. Their terms and conditions list no maximum, nor do they mention business expenses. From experience if you are a good enough customer, they couldnt care less how many points you put through. A business colleague however was limited at $3million points for the year.
Of course it has all the insurance, purchase protection etc that you expect from a platinum card.
St.George Privatebank