The most serious fuel price shock to hit Pakistan in more than half a century threatens to unleash a flood of cascading crises that could batter all aspects of the economy and undermine the government of Prime Minister Shehbaz Sharif. Earlier this week, Sharif said Pakistan’s oil import bill had surged from $300 million before the conflict to $800 million now, which he said erased all the economic progress the country had made over the past two years.