Do you have any insight into why so many people buy lunch instead of bringing it? I've had a desk job for about 20 years now and I think I've bought lunch maybe 10 times when for some reason I wasn't able to make my lunch that day. It seems to me that buying lunch is more expensive and a person will probably eat more calories. I can't imagine it is a time issue, I probably spend less than 5 minutes putting a lunch together every day. That is far less than the time required to go somewhere for lunch. I assume it also isn't an issue of wanting to get away from the desk - most office places I've seen have lots of places a person can go and eat.