The role I perform to earn a crust involves importing over a thousand shipments a year, by air and sea, from 18 origins around the world. After nearly thirty years dealing with Australian Customs, a few things have become quite clear:
Most Customs people are barely literate and wombats generally have higher IQ's.
Most Customs people fancy themselves as "important people".
Have wet dreams thinking about having black shirts with SS on their collars.
...And almost ALL Customs people will sprout ANY bullsh!t to try and make themselves appear intelligent / superior / competent / informed / etc.
The return in revenue compared to the cost of screening necessitates a threshold. Besides, if a consignment matches predetermined criteria - say, from a high risk country to a private address - it is already checked regardless of the value declared anyway, even it comes with the postman!
I'm not saying the policy won't change, but I have heard so much crap from so many Customs people for so long, I worry about things when they happen. Certainly not when it is "planned" to happen.
(Good on you GTRKat....that's how I feel about Woolies too!!)