New Zealand Prime Minister Jacinda Ardern, the world’s youngest female leader, says her government aims to achieve pay equity for women in the public service within four years as a catalyst for widespread change. More than 120 years after her nation granted universal suffrage, Ardern hopes it can again be a flag-bearer for equal rights. “If New Zealand is seen as a champion of issues around gender pay gap and pay equity, I would be proud of that,” Ardern, 37, said in an interview Tuesday in Wellington. “I know, though, that we will only be seen as a world leader if we’re able to make inroads ourselves.”