Bazz,
A very obvious flaw in your reasoning is that electricity demand in Eastern Australia rarely exceeds half the maximum.
And why are you assuming it would all have to come from wind when solar is also available and getting cheaper?

I don't doubt, of course, that there are silly greenies; after all, there seem to be silly people of every philosophy. But WTF is the scheme with the "no private cars" clause?

I suspect that nuclear will end up being the only practical method of
producing electricity on a large scale.
The first one we build will probably be very expensive and take too
long to build. Hopefully the contract will be given to a French or
US company and give experience to local engineers.
In the meantime we will have to build more coal fired stations.
Slavery ended when steam power became cheaper than slave power.
This enabled the slave owners to become good fellas.
Energy transitions are up there with all the other major changes such
as the telegraph, radio, the internal combustion engine, aircraft etc.

Bazz,
Nuclear certainly won't be the only practical method of producing electricity on a large scale in Australia, and we certainly don't need more coal fired power stations - they're now almost as bad from an economic viewpoint as they are environmentally!

>Slavery ended when steam power became cheaper than slave power.
Maybe in some parts of the world, but slavery was ended far sooner in Europe.

The production of 'Green Power' will cause that much pollution that'll make these targets utterly irrelevant !