Fair enough. But maybe you are more economical than many.
An awful lot of food is bought and then thrown away. Many people with the ruddy great fridge/freezers just don't know what they have lurking in there and much of it is no use when they do come to find it.
Like you we do buy some large packs of food but we know how much we have and we eat it more or less straight away. My wife used to work in catering and is a great cook who knows how the plan and source meals.