Budget to confirm surplus of $9.3 billion - but then sea of deficits as unavoidable spending booms

There's been a constant dripfeed of budget news from Treasurer Jim Chalmers over the past week - but in less than 12 hours, the full economic blueprint will be unveiled. This morning's pre-budget installment is confirming a second consecutive surplus of $9.3 billion by the end of June - but after that successive deficits that will be bigger than expected six months ago.