Treasurer Jim Chalmers warned the Iran war is threatening to drive inflation towards 5 per cent and wipe billions of dollars from Australia, but said it was why he would deliver bold budget reforms.In a pre-budget speech this afternoon, Chalmers said new Treasury scenarios forecast inflation to reach from high 4 per cent if oil prices stay at $US100 a barrel to 5.5 per cent if prices continue to rise to $US120."It means the prospect of inflation peaking in the