It is not entirely unlikely that the Australian government will introduce a 'health levy' on fast food and confectionary (as a result of the budget blowout in bashing foreigners), since they have appointed a health expert to the treasury to examine the idea.

This would actually be in line with the taxation on alcohol and cigarettes, which are the highest in the world. Also, before VAT/GST, these foods were taxed at the 'luxury' rate of 20%.