The Employers and Manufacturers Association says employees who don't like being paid the minimum wage should change employers.
Unions say a planned increase in the minimum wage to $13.75 per hour is not enough.
But the Employers and Manufacturers Association says those on the minimum wage should move to employers who are paying better.
Chief executive Kim Campbell said the association does not agree with paying the minimum wage because businesses tend to be more productive when employes are paid better.
However, he said some small businesses may struggle to pay the $15 an hour unions want.
Mr Campbell acknowledged that many employees may not be in a position to change jobs.