There is a cultural factor too in addition to economic one. E.g. in India, packed lunches are very common and even movie stars get their, admittedly elaborate,

There is a cultural factor too in addition to economic one. E.g. in India, packed lunches are very common and even movie stars get their, admittedly elaborate, lunches packed from home. It is getting somewhat less common for double-income-no-kids type families but still quite prevalent in general. The dabba[0] system used to deliver home-made packed-lunches from home to the office desk gained international fame. [0]: https://en.wikipedia.org/wiki/Dabbawala https://en.wikipedia.org/wiki/Dabbawala