The Parliamentary Budget Office costed a similar proposal in March last year and found it would reduce the fiscal and underlying cash balances by around $12.4 billion over the forward estimates and by $68.9 billion in 2034-35. That's a staggering amount of money for a policy that is poorly targeted and does nothing to address the structural barriers that real families face. Income splitting is not a fair reform. Families in Griffith deserve better than that.