The former treasurer and deputy Liberal leader said he's still deciding whether to make a political comeback, which he'll announce in the new year.

Premier Ben Carroll, Opposition Leader Jess Wilson, One Nation's Colleen Harkin and pollster Tony Barry preview November 28's closely watched election.

The shadow treasurer also blames government spending for inflation and says the Coalition would not 'spend willy-nilly' if elected.

The treasurer says there's 'likely to be billions of dollars extra' in higher bills on government debt in December's budget update.

The Nationals leader said he'll do 'whatever it takes' to beat the Labor government – including not ruling out a move to the lower house before the next election.

The environment minister has fought back against criticisms that very few world leaders will attend the pre-COP meeting in the Pacific.

The Greens' longest serving federal politician said politics 'isn't working' for ordinary voters and all parties need to do better at addressing their grievances.

Speaking before the National Cabinet meeting ended, the cabinet secretary warned household bills are likely to rise if data centres are powered by coal or gas.