Killer Joe - The "supply/demand" on this one is actually quite interesting. I took an econimics class where they made a point that most people don't understand what the law of supply and demand are, nor do most people realize that they are two different laws that work together.
The law of supply states that the more something costs, the more people you will have that are willing to sell that good.
The law of demand states that the less something costs, the more people you have that are willing to buy that good.
These laws form the basis of an economy where the free market system creates a balance where the number of people who want a good matches the number of people who provide that good.
Consider - The "acceptible" price of pizza in a town is $10 per pie. 100 people decide that at this price, they can make a living selling pizza. But, at this price, only 5,000 want to buy pizza. Each shop can make enough pizza to feed 1,000 people so there is enough pizza supply to feed 10,000 people.
Pizza shops realize they aren't working at capacity, so in order to gain an advantage, a few of them drop their prices. Now, the "acceptable price of pizza is $9 and 6,000 people are willing to pay that price. However, 10 suppliers decide that they don't want to sell for $9, so they go out of business and find something else to do.
This continues until 70 stores are prividing pizza for $7,000 at a price of $7.50 per pie. The desired demand now matches the number of people who are willing to supply. and the free market system has worked.
Two problem:
1. The law of demand breaks down with gas. It is effectively very difficult for people to change jobs. Technically, the law of supply works, but there are too many outside influences for people to decide they won't pay anymore. Eventually, it becomes too expensive for people to afford it, but that requires lifestyle and/or employment changes.
2. The law of supply breaks down with gas. As the price of gas increases, the theory is that more and more people should be willing to supply it. Unfortunately, it is not as easy to start producing gas as it is to open up a pizza shop. Effectively, this is a monopoly situation because breaking into the oil industry for a new company simply isn't practical.