Imagine a city without scarcity. What would your city look like with an abundance of healthy food, clean water, energy, and housing?
Market economies thrive on scarcity. If you could make your own paperclips at home, free of charge, why would you ever need to purchase them? If you had time to do your own oil change, why would you ever pay somebody for this service? If the source code for a program were available without restrictions why would you pay for the license? Scarcity of materials, time, and intellectual property allow businesses to prosper in our economy.
However, there are some situations when scarcity is not in the public interest.