[barrell]

I do not think value and scarcity are identical, merely that they go hand in hand. In the desert, I would pay a lot of money for water. In the west, I would never pay for a glass of water, even if it's blistering hot and I'm parched. The requirement is the same, the value only changes due to scarcity.

What you are talking about is needs, which is an entirely different discussion. Value can also be used to discuss needs (how valuable is something to survive), but I think I'm quite clearly using it to describe something different.