Opposition treasury spokesman Joe Hockey is defending the coalition's policy costings from what he calls a barrage of "hysterical allegations" from Labor.
The costings, released yesterday, were done by an independent audit firm after Treasury analysis of a coalition policy was leaked to a newspaper.
Labor says independent analysis from the National Centre for Social and Economic Modelling (NATSEM) shows the Coalition's education tax refund policy would actually cost at least $1.14 billion, double the amount quoted.
The Coalition has used NATSEM for modelling itself.
But Mr Hockey said it was the third set of numbers the government had produced on the policy, and called on it to back its claims by releasing the modelling.
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"The government makes an aspersion, makes a claim, but doesn't release the information," he told ABC Radio on Thursday.
"This is their form, they just make allegations, hysterical allegations, and expect the media to do the heavy lifting, but they never actually release any of the information to back up their claims."
Mr Hockey took aim at Labor's plan for a western Sydney rail line plan describing it as a "fishes and loaves" promise.
"I know they have a very high regard for themselves, but I don't quite think ... they can just manufacture stuff from a small amount of money," he said.
Mr Hockey promised the price of drugs for pensioners wouldn't be forced up by the coalition's cuts to the Pharmaceutical Benefits Scheme.
