Bring in a fair price policy. Ban or heavily tarriff the import of foods with dubious labour, environmental and subsidy/market dumping. These are goods produced which would not meet Australia’s expectations or if produced in Australia under the same conditons, would be subject to statutory enforcement (e.g. non-compliance with Australia’s labour, environmental, animal husbandry, quality etc requirements)
I expect that pressure on the supply chain reaults from the consumer’s desire to have a product at the cheapest possible price, without considering the ethics behind the products. Australian businesses are then expected to lower their costs to meet imports which are driven purely by price and potentially source products from countries where its workers and farmers can’t remove themselves out of poverty due to price paid for their goods (so that we can have cheaper goods in Australia)… …this is the modern slavery.
If ethics or fair price is dealt with, pressure on the supply chain will be reduced and Australian companies are more likely to be able to compete on a level playing field.
Modern slavery legislation responds to the behaviour caused by a problem, and does not solve the underlying problem.