Radio National Breakfast

A new war of words has broken out between state and territory governments, after the Productivity Commission labelled the 2018 GST deal for Western Australia a "costly mistake".
The interim report from the Productivity Commission - released on Friday - found the deal has cost the federal budget $23-billion in its first 6 years, $22-billion of which had flowed to WA.
We hear from the former Finance Minister who was a key architect of the deal - Mathias Cormann. Then - the Treasurers of Western Australia, New South Wales and South Australia. 
As well as the GST carve up - we get into the announcement of a joint gun buyback scheme between NSW and the Federal Government.
Recap the morning's news, politics and global affairs with the Breakfast Wrap.

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The NSW Treasurer says data centres must demonstrate how they will offset their power and water use.

The Productivity Commission has labelled the 2018 GST deal for Western Australia a "costly mistake", but Mathias Cormann defends the GST arrangements struck while Finance Minister.

The Productivity Commission has labelled the 2018 GST deal for Western Australia a "costly mistake".