K7GLD said: "Just like the trucking industry, why should they care what the price of diesel is, if all they have to do is pass that price increase on to the shipper and consumer?"
If only it were that easy. Trust me Gary, they care. The flaw in your logic in this case is that while the oil companies may not be competitive (a cartel) and just immediately if not sooner pass through their price increases, truckers definitely are in a competitive business and shippers, even though they understand fuel costs are rising, are also involved in competitive businesses and need to pay as little as possible to get their goods moved.
There is going to be a lot of fallout from these fuel prices, among them a reduced capacity to move the freight due to there being less trucks around to do it.
Many independent truckers and smaller companies just aren't gonna make it, at which point the general public will really see the price increases reflected in everything they buy, because the remaining truckers will then be able to raise their prices to pay for not only their current costs but also to recoup what they lost staying alive to get to that point.
It's the natural cycle of things in an essentially deregulated (at least from a pricing standpoint) industry. This whole situation is going to get worse before it gets better.