One affect of "Gerry Harvey's law", is already in place: I will never spend a cent in Harvey Norman, Joyce Mayne, or Domayne stores, ever again.
Already, my experience is the GST on importing $1000 items is 20%.
$100 gst + $100 gst "fee".
Plus an unbelievable amount of paperwork, and hassle.
My friend sent me a few miscellaneous parts from the US. I had to clam separate codes for brake parts, as opposed to wheel parts, etc. I was directed to a 1000 odd page document with 10s of thousands of codes. These were some sort of "import codes".
It was quite surreal, and not an experience I'd like to repeat.