But Mr Porter said the government had already moved to ban ads which offered pay below the national minimum wage along with beefed up penalties for underpayments in its industrial overhaul.
"The legislation creates a new criminal penalty which carries a jail term of up to four years and fines of up to $5.5 million for the most egregious forms of deliberate and systemic underpayments,"Mr Porter said.
The Attorney-General,who introduced the government's long-awaited overhaul of workplace law to Parliament last week,is facing pressure from both business and employee organisations over the Morrison government's plans to tackle wage theft.
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James Pearson,chief executive of the Australian Chamber of Commerce and Industry,the country's largest employer group,wrote to Mr Porter last week arguing for a two-year delay on some of the new laws.
"Small and family business owners won't have greater confidence to hire staff if they may face jail or a crippling fine for a genuine mistake or an accidental payroll error,"Mr Pearson said in a statement.
The government's toughest criminal penalties will be reserved for only the worst cases of wage theft while its prohibition on advertising underpayment applies across the board,but only to wages below the national minimum of $19.84 an hour. Unions already have the power to inspect businesses'books if they apply to the Fair Work Commission,which the labour movement wants expanded.