Picture: NewsWireCash-strapped mortgage holders are on the brink with another interest rate hike likely to push many households over the edge. Mr Koch warned another rate hike would be devastating for many households. "Essentially, they're getting another rate hike when they go to fill up the car." Picture: NewsWire / Monique HarmerInstead, Mr Koch called for RBA governor Michele Bullock to talk with Treasurer Jim Chalmers about government spending. RBA governor Michele Bullock has announced three interest rate hikes in 2026 as the central bank tries to tame inflation.