This is what happens when governments release thought bubbles...

This is what happens when governments release thought bubbles with no details. A cap is tricky because there's no point capping exports, that's just a wealth transfer to other countries, but if you only cap domestic supply than you create an incentive to divert supply offshore. They'll prob opt for a tax and directly rebate power retailers, maybe an additional levy on every tonne produced. The irony is that soaring coal and gas prices are delivering huge revenues to the federal budget anyway, so they could fund a rebate without any additional taxes.