The government's proposed changes announced today for returning parents and roster changes are not enforceable.

"Labor will need to negotiate with the Greens to get any changes through then Parliament. We are not interested in helping Labor use parents and families as a re-election prop. The Greens want an enforceable right to flexible work for all workers, especially carers," Mr Bandt said.

Billionaire heir to Lang Hancock's mining empire Gina Rinehart has no idea what life is like for workers on the minimum wage, the Australian Greens said today.

Greens Senator for Western Australia Scott Ludlam said Ms Rinehart's desire to cut the minimum wage was "based on ignorance and a complete lack of concern for the challenges working people face in their lives".

Greens MP and workplace relations spokesperson Adam Bandt has welcomed support of the ACTU and workplace academics for his Work-Life Balance Bill in evidence to a House of Representatives inquiry today.

The Standing Committee on Education and Employment held a public inquiry into the Fair Work Amendment (Better Work/Life Balance) Bill 2012 today.

"I welcome the support of the ACTU for my bill today", Mr Bandt said today.