if your luck is lousy you get roving militias in Toyota pick-up trucks with machine guns mounted in the back.
Probably not. Toyota pick-ups require gasoline. Extracting oil and refining it into gasoline is a sufficiently complex process that it's impossible under the kinds of property regimes the "roving bandits" can maintain.
Interesting hypothesis. But it doesn't align with facts, bummer. https://en.wikipedia.org/wiki/Technical_(vehicle)
How much money would it take to engineer biological immortality for at least half of the world's population, within 20 years, with 99% confidence?