Premium price is fair enough - current feed in price isntWhen solar was first coming into WA in a big way the feed in price was something like 47c or 48c, way more than the 6 or 7c it is now.
Those deals were locked in for 7 to 8 years as incentive to get people into it.
If the tax on fuel that is for funding the cost of repairs to the road network being returned to businesses that don't use the road is seen as government giving money to that industry then the premium price on feed in is too.