Labor isn't baulking at the prospect of a Senate hostile to its changes to the tax system, claiming an election victory would give it the "moral authority" to legislate.
Conservative Party leader Cory Bernardi told the ABC's Fran Kelly Labor had not respected mandates from previous governments.
Senator Bernardi said while he wouldn't be an impediment for the sake of it, governments did not get a blank cheque to get legislation through the upper house.
But he can see Labor's agenda winning support, "I do see pathways because I've seen people in the Senate ditch their longest-held principles at the slightest whiff of political advantage." the South Australian Senator said.
The opposition's plans to scrap cash refunds for some shareholders and change negative gearing will provide crucial funding for their extravagant spending promises.
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