The Parenthood CEO Georgie Dent will use an appearance before a parliamentary inquiry into the scheme on Monday to outline key areas of reform.
This includes a six week "use it or lose it" provision in the 26-week leave scheme in a bid to incentivise men to use their entitlement.
Ms Dent will also flag an increase to paid parental leave of up to 52 weeks equally shared between two carers, a boost to the payment rate from the minimum wage to a replacement wage and the extension of superannuation guarantees.
"Australian parents receive far less paid parental leave than parents around the world and it costs children, families, our society and the economy," she said.
"Australia cannot become the best place in the world to be a parent and raise a child if we don't seriously lift ambition on the national paid parental leave system."
Ms Dent says the paid leave allows parents to adjust and adopt a good caring routine in the crucial first year of their child's life before having the option of returning to work.
She said a robust leave scheme is also critical in achieving gender equality in the workplace.
"A generous and equitable policy enables men and women to more equitably share the care at home which in turn facilitates more participation in paid work," she said.
"To make Australia a world leader in relation to gender equality, there is no bigger opportunity than better supporting parents to share the care."
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