Unite Union says the wages of fast food managers have plummeted over the past 20 years.
In 2003 the average rate was around $12.60 an hour - or 33 percent above the minimum wage.
However, by 2021 that gap has halved - with the average now being 17 percent above the minimum wage, or around $24.20 an hour.
Unite Union assistant secretary Gerard Hehir spoke to Corin Dann.
