Wants and Needs

The entire science of marketing is set up to satisfy our needs, but also our wants. To turn our wants into perceived needs. To come up with something that we were perfectly happy without and first turn in into a desire and ultimately make us believe that we cannot go on without it.
The financial crisis has numerous negative sides, no doubt about it. People losing their homes, jobs, their future...many people are faced with conditions that they may have not thought would ever be possible. When one has to give up their lifestyle, they have to revisit the deeper self and re-evaluate the values, the needs and desires. It is possible that many of us will realize that there are many things we got used to using, but ultimately, they were not our needs. Simply our desires. A Magnum Temptation cannot qualify as a need. Food and drinking water does. As long as not everybody on the planet has access to it, why are we constantly coming up with more "potentially desired" products and turning our back to those who pay the price of our lifestyle?
I have to admit, that Magnum Temptation does taste great... Could it turn into a perceived need? Is the financial crisis the right time to revisit our definitions of wants and needs?