Well since oil fell, companies noticed that they're making more money since they have less fuel costs. That's no reason to not make more money right? Like... who's gunna notice?
Gary, I'm not going to take off on the main portion of your post, however, I will expand on the above ..
During the uptick in at the pump prices, which peaked at around four bucks a gallon on average in 2010/2011 I believe, every Company that had anything within their infrastructure that even remotely required fuel jacked prices under the guise of "We hate to do it, folks, but hey, gas costs a lot more money these days" .. I don't really have a beef with that, gas did cost a lot more money ..
The impact resulted in diversion of corn to the ethanol industry since farmers could do better selling crops as a fuel additive rather than as, er, food for cattle, etc .. this then had the ripple effect of raising food prices in general, since, again, gas/diesel being a big part of the cost, delivery wise .. I can't blame farmers, they are in business to make a profit ..
UPS / FedEx raised rates at the 10% a year average, which, of course, compounds on itself as well as adding Fuel Surcharge, Rural Delivery pricing, etc, again, based on $4.00 + gas .. I could cite other various examples ..
The point being, the fuel cost peak pricing caused a fairly dramatic wave that ran through the Economy in general, so now, with projected future prices expected to stay low, where is the drop in the various industries effected as it relates to goods being sold, delivery, etc .. ?? It lines the pockets of the industries and they are not going to drop prices .. so, the gas price peak ended up being a gift that looks like it will just keep on giving ..
On a side note :: Back in the 90's, I was in Buffalo, NY and decided to take I think 403 across thru Hamilton / London in order to avoid the extra driving (at least it looked like I could save some time with that route) .. I had neglected to fill up, thinking I had enough gas to get to Detroit, which turned out I did not .. so, pulled over to a Canadian station, I knew I did not need much to get back into the USA, so I put $10.00 worth in and paid the place .. got back in the van, cranked it over and looked down at the fuel gauge, which had not moved a millimeter .. got out, went in, looked at the Attendant and said "I think there must be something wrong with your pump, since it does not look like I got much gas at all .. " .. she looked at me and said "Sir, the price is in liters, not gallons .." as she did a slow eye roll ..

.. I think I also gave like 5 or 6 bucks even back then for a pack of Marlboros ..