This would have been more interesting if it addressed desire and what motivates them. If you ask someone whether they really need something they are likely to say no but "I want it" or "I don't need it but want it anyway." The desire for most material things are not there based on needs but on wants, desires that most people never really consider nor understand. The actuality of wanting something and having the ability to get it is justification that really doesn't need justifying, but if we get people to become aware not of only their desire but what is motivating that desire then you can actually move someone to transcend a "want", the desire.