Re: So how were they making money?
>surely this would have been picked up very quickly by the ATO.
They 4 had insiders at the ATO. The father of one of them, Michael Cranston, was a senior figure at the ATO, although there have been different reports as to the depth of his involvement.
Despite the insiders, it looks like the fraud was so big that others at the ATO also picked it up.
How it all worked will probably come out in the court case.