Consumer New Zealand and the Food and Grocery Council have written to MPs urging them to back an overhaul of the supermarket industry.
The organisations say consumers and suppliers are being held to ransom by the two major supermarket groups, Foodstuffs and Woolworths.
The head of the Food and Grocery Council, Katherine Rich, says with the lack of any real competition between the two chains, the companies have been able to maintain staggering profits not seen anywhere else in the world.
Rich, and Consumer New Zealand chief executive John Duffy spoke to Corin Dann.
