The French should work two years longer to age 64 before retiring, Prime Minister Elisabeth Borne said, detailing an unpopular reform of the pension system that prompted unions to call swiftly for a first day of strikes later this month. The right to retire at a relatively young age is deeply cherished in France and the reform will be a major test for Macron’s ability to deliver change in his second term, all the more so as social discontent mounts over the cost of living.