You can also argue that a house is a luxury if you use the thought process that you currently are using. We have 10,000 homeless people in my city. Just because you can live with out something doesn't charictorize it as a luxury. Everything materalistic thing you posess would be a luxury with that arguement. A luxury would be something that you can do with-out, but get your goal completed. So a internet connection might be a luxury for somepeople, but those who are using mission critical applications, it is anything but a luxury.