The Federal government can impose other taxes, like a resource rent tax. It works the same way as a royalty , it's just not called a royalty.
The miners and gas exporters are evading company tax anyway they can by transfer pricing or whatever so we have the right to recover that lost revenue by other means if necessary.
A royalty is totally to a rent resources tax which can be imposed by the Federal Government but as I explained to you before, Wayne Swan imposed a RRT which failed to meet his prediction......And I will say it again, the RRT cost more to administer than the return...Swannie was going to use it to fund the NDIS and Gonski....those two were never ever funded and is now in the lap of the current government to find the money.
If you are not up to speed as to what is going on, there are international arrangements being put in place to stop the loop holes of tax evasion...Something Joe Hockey implemented during his term as treasurer and to the best of my knowledge is still under negotiations with other G20 countries.