South Korea’s AI-driven semiconductor boom has sent exports, corporate profits and stock prices to record highs, but a senior policymaker has warned that the windfall could fuel property speculation and deepen inequality if its gains remain narrowly concentrated. “Looking solely at the numbers, it is something to cheer about. However, strangely, a corner of my heart feels heavy,” Kim Yong-beom, chief of the Presidential Policy Office and one of South Korea’s most senior economic policymakers,...