I think you already answered your question. Adopting the balanced path or aitadaal whatever you say it is just like the self control system. When you say too much in response or during conversation, people just become bored or their concentration loses. Similarly consumption of goods and services gives rise to issue of currency notes/bills. When we consider luxury as our need then we simply ignore the principle of aitadaal. However it is in itself a debate that what is a luxury and what is a need. Mercedes and Suzuki Mehran both serve the same purpose but both have different customer/user types. So in my view aitadaal is part of our everyday life as we take breath in. Our lungs only take what is required.