definition of super tax

"The government has decided anything above a 6 per cent return is a super profit and will be taxed, in addition to normal tax, at 40 per cent.

As stated in the http://www.abc.net.au/rural/news/content/201005/s2890968.htm

I'd like to see Kev try the super tax on the banks and how far do you reckon he'd get.