People are often unsatisfied with what they have and this is due to scarcity. People want what they can not have and this is due to limited resources.
One of the three basic economic questions is "What to produce?". A society cannot have everything its people want, so it must decide what to produce.
Another economic question is, "how to produce?". There has to be a balance when it comes to making produce and who is employed to help make products. Lower costs makes manufactured items less expensive and, therefore, available to more people.
Another economic question is, "for whom to produce for?". A society decides the "what" and "how" to produce. As long as there are not enough resources to satisfy people's seemingly unlimited wants would be how the question for whom to produce for would be answered.