So now the government has to enforce people to buy future proof technology because they could be left with depreciating goods? Come on.
Maybe the gubmint should force everyone to wait for the R600 and NV60 and Pentium 10Ghz, lest they be stuck with worthless old tech.
People who bought SUVs, but them for reasons beyond mileage. Hybrids won't make them useless, Americans frequently upgrade cars anyway, and if they're struck, they're stuck. That's the life of a consumer, and it's not the government's job to make us buy what technocrats think is "the most optimal product" to "save us" from a "bad" purchase.
Also, your analogy with electricity distribution is flawed. Because of the way the distribution network is wired, missing supply requires you to get power from farther away, where you face diminishing returns and it is even more costly, because electricity routing isn't packet-switched-point-to-point, so unless you want a major blackout.... Power networks don't work like shipping a barrel of oil from point A to point B. Imagine if you're short one barrel of oil from Saudi Arabia. In order to make up for this one barrel, you have to ship five barrels of oil from the moon. And if you don't do this, all engines that use oil will "blackout" Oil will not scale like electricity prices did. Yes, there will be shocks, but it will smooth out, just like every other declining commoditiy has.
As for large food price increases, doubt it. Transportation is not the largest input to the cost of food. I can buy fresh produce by driving to California farms for roughly the price I can get it in the local market. Cost to ship 3 tonnes, of say oranges, 1000 miles in a truck is about $200 of fuel (go spec it yourself, a truck that can haul 6000 lbs, will get 10mpg on highway) But I can sell 6000 pounds of oranges for about $8000-$12,000.
Look at it this way. I can buy grapes from *CHILE* for $2/lb. If transportation from Chile somehow became prohibitive, I'll buy them from Napa.
Yes, transportation problems will drive the cost of virtually everything up. But that just means inflation, which also implies wage inflation. A shortage of oil isn't going to make a DENT into the amount of food the US produces for it's citizens. Even at 1/2 production, we easily make enough food to keep American's nice and fat, so there will be great diet or food shortage for Americans. Now, for the rest of the world who buys our food exports, it's a different story. And it will be bad for globalism and trade, making overseas products even more expensive.
The only thing that could truly make food more expensive for Americans (when indexed by inflation/cost of living/purchasing power) is a drop in supply for Americans. Frankly, I don't see it. I could see oil prices driving inflation up like it did in the 70s, but did it make Americans thinner, did it make food radically more expensive? Nope.