Maybe this is one of the reasons for vanilla ice cream price increases:
https://www.canstarblue.com.au/news/vanilla-shortage-affects-ice-cream/
It appears that there has been mass hysteria and anger about Woolworths and Coles removing the single use shopping bags, especially ahead of mandatory introductions by some state governments. In response, Coles and Woolworths are giving away thicker ‘multi-use’ plastic bags (as single use bags) for free as a transitional arrangement as a public relations exercise in response to the criticism they have received.
I suggest that since the introduction in the ACT was mandated, the community and retailers had no choice. Voluntary introduction pre-mandatory introduction appears to have caused concocted outrage as it has been imposed on the community by big business - how dare they 
.
They would have been far better giving each customer with say a flybuy or rewards card 4-6 cloth/fabric bags the first shop post introduction. These bags will last many multiple times longer than the thick plastic bags and will be seen as getting something for nothing. Giving away free multi-use plastic bags is like taking with one hand and then giving back with another.
