The supermarket competition debate continues on, with National indicating they'll make changes if re-elected.

The party's proposing to increase competition by splitting Pak'nSave from New World and Four Square - as long as the Commerce Commission agrees.

Kai Co founder and operations director Ethan Vickery says it's hard to tell how this proposed change will impact Kiwi consumers.

"It's really complicated, but I think you have to look at it and be like - why is New World's everyday prices more expensive than Pak'nSave's? Why is Four Square's everyday prices more expensive than New World's? And yet, they all buy from the same DC and they're all part of the same co-op." 

LISTEN ABOVE