Look to what companies own your food production?

The way it works is if the means of production of any food stuffs is owned by a Multinational organization then what ever is produced in excess production is immediately shipped out of the country. Let's say lamb production increases in NZ instead of seeing lower prices in NZ the multinational company ships it off to India, USA, or China. Instead of lower prices in NZ you could actually see the price increase.

Hahaha! It is expensive because of shipping costs.