It's weird, I know. It's not an unusual sight to pull off Interstate 95 for a quick fill-up and a spot of Roy Rogers, and see someone from out of state hop right out of their car to the pump and immediately be told to sit back down again. … The cheap gas comes as a result of this strange labor practice. … But it also penalizes an environmental externality (burning fuel), and since poor people tend not to own cars, it doesn't have the regressive implications of a sales tax. …

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Should New Jersey Get Rid Of Its Cheap Gas? – Jalopnik