Two critics of China’s growing influence in the South Pacific came to Ottawa this month to plead for Canada and the West to invest money in their homeland, the Solomon Islands, as a counterbalance to Beijing. “Where is the West?” asks Daniel Suidani, who was ousted as premier of the Solomon Islands’ most populous province earlier this year. He has long criticized his country’s intensifying relationship with China and had barred Chinese investment in his province of Malaita. Mr. Suidani was removed in a non-confidence vote that he and his supporters had boycotted. “We share the same values and principles,”...