........The mining tax was first proposed by Ken Henry. It was part of an entire reform of the Australian tax system and the economy, post-mining boom.

It included measures like scrapping stamp duty on home sales to allow more mobility in the housing market, lowering company tax to stimulate development, and raising superannuation from 9 to 12% to create a greater pool of Australian investment and raise retirement income.

The current government picked ideas it liked, and knocked back others. The Henry review also wanted a 5% rise in the GST, which would be a hard sell, but Labor implimented the mining tax and have a date to raise super........