Food is a lot more expensive in NZ than in Germany (to give one datapoint).
That said, I've noticed the portions of food tend to be smaller here in Dublin as well (I suspect being a metropolitan area the supermarkets cater more to individuals whereas the supermarkets back home tend to cater to families). For example, it's next to impossible to buy 1kg of Cheese here in Dublin as the largest you can get from a supermarket is 400 grams.
Eating out is cheaper in Germany (if you weight prices relative to wages) than NZ.