Are you living that close to the edge, budget-wise? Is that why you assume everyone else is? I don't know about you, but I will be able to afford to drive and buy food if the price of gas doubles or even triples. I'll have to make some adjustments, but I certainly won't be sitting at home, starving and bewailing the fact that I didn't buy a more efficient vehicle.
(Also? There are stores in the suburbs.

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