Of course, MT is late to the party touting high efficiency coal...

Of course, MT is late to the party touting high efficiency coal stations

They aren't high efficiency, they are higher efficiency.
The levelised cost of energy for the ultra-supercritical coal-fired power station would on par with new gas fired stations.
The coal station would have higher emissions.
The plus for coal over gas is that the plentiful supplies in the area, (North Qld), where the Federal Government is considering offering subsidies for new building.

A lot of our gas supplies are being exported because of the past need to write export supply contracts which were required to raise the necessary finance to develop the infrastructure.


So it looks like the Government is contemplating that taxpayers will be subsidising electricity generation in an attempt to keep prices down.

SA has plenty of power generation capacity, with idle gas powered stations. Gas has become expensive and it's cheaper to import electricity from Vic at the moment.