Our current economic model is pretty much a linear one: take (extract) - make (stuff) - waste (landfill). It treats resources as infinite and assumes the environment can absorb the waste. It is therefore unsustainable in the long run.
Australia generates 316,000 tonnes of HDPE plastic per year. Most is landfilled. If every MGB in Australia was required to be black, that alone would absorb 258,000 t of HDPE by adding 10.4kg of recycled content to every MGB at every home.