Mr Swan said Mr Abbott's plan to cut company tax by 1.5 per cent, to 28.5 per cent from mid-2013 while imposing a 1.7 per cent levy on firms to pay for a parental leave scheme was contradictory.
"So Mr Abbott must be the only political leader in our history to announce a big tax increase followed by a small tax decrease on the same companies at the same time," he said in Sydney.
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Mr Swan said he recalled Mr Abbott saying on June 27 that no one would notice company tax cuts of two per cent.
"So today he comes out with a company tax (decrease) which is even less than that, and says it's a big deal," Mr Swan said.
