Price cap wont work, we will just export everything which would...

Price cap wont work, we will just export everything which would be a disaster, What price do they set the cap at $300 AUD a tonne? That is almost 50% below current spot, but that price would still result in elevated electricity prices. What compensation would be provided to miners? At least the fuel security act had some carrot for refiners, in the form of a government put. I think something like this is the most likely outcome: Fuel Security Act 2021 (legislation.gov.au).
Also an overly high tax like in QLD will just kill development of new resources. Just look at QLD just before the royalty hike there were pages and pages of new mins that had advanced approvals that were about to come online, how many have actually continued to develop their resource? Doesn't seem like too many have.