Key cabinet minister Josh Frydenberg has said reforming Sunday penalty rates would boost Australia’s economy, in an interview on Sunday with Andrew Bolt.
On Monday morning, 3AW presenter Neil Mitchell asked Mr Morrison if he agreed with his Liberal Party colleague.
"There is a report already in draft form and that’s where that discussion is best held."
The report Mr Morrison referred to was the Productivity Commission’s inquiry into workplace relations.
The commission's draft report last month recommended Sunday penalty rates for retail and hospitality workers be reduced to Saturday wages but to keep the higher pay for essential services such as nursing.
Unions have vowed to fight the recommendations, and the Australian Council of Trade Unions has lodged its submission to the commission, claiming the "attack" on penalty rates would result in a two-tiered workplace system.
'Cutting rates would hurt the most vulnerable'
In the submission, the ACTU says cutting Sunday rates were the start of a slippery slope and more workers would be expected to work weekends with "little or no" acknowledgment of "personal sacrifice" of unsociable hours.
The commission's report proposes the option of allowing the commission to make temporary changes to the minimum wage in exceptional circumstances.
It recommends tweaking unfair dismissal laws, so employees can only receive compensation when there was no evidence of underperformance or misconduct.
The ACTU says calls to slow down minimum wage growth could increase inequality and drive down overall wages.
Secretary Dave Oliver said the inquiry was Mr Turnbull's chance to show he was not in the pocket of employers and wouldn't attack workers' conditions.
"If you wanted to write a list of what was needed to make Australia less prosperous, less fair, less progressive, then the Productivity Commissions recommendations are it," Mr Oliver said.
"The commission has ticked every box for unfairness."
