I think your argument is flawed as many have already eluded to...

I think your argument is flawed as many have already eluded to in their replies so I wont go over old ground. But I think you are missing the other advantage here. I have an off set account on my mortgage (yes I still have a mortgage but I am confident that once we hit $166 I wont) the longer that money is sitting in there the better off I am. I am not one that has to have something right now, I am happy to wait if I have to but why would I want to if I can have it today and without affecting the benefit of an offset account?

Each to their own brother.