3600 points a week as per your example would still not be above their intended threshhold. Its is specifically credit card points they are looking at. Most small business owners (myself included) put all their business expenses through their cards and are then reimbursed by the business, whilst retaining the benefit for themselves and their family. The ATO thinks that this is therefore de Facto income, and should be assessed. Personally I don't think there is enough nexus between the employment relationship and the benefit being provided for it to ever be seen as taxable under our present legislation. It would need to be specifically enacted for this to be so. Which is not to say that the Commissioner wont go ahead and issue a TR which does not comply with the law as it is written (wouldn't be the first time), thus creating law as it suits himself.
As I said earlier - if you're that worried just spread the "love" around. Much more difficult to then be identified as a potential audit or test case. Months in the AAT is no fun, even for a public servant!