A senior adviser's Facebook post about sharing surplus AI tax revenue crashed South Korea's stock market 5.1 percent. The fragile variable beneath the AI infrastructure buildout is the political question of who benefits from what the infrastructure produces. Kim Yong-beom, South Korea's Chief Presidential Secretary for Policy, posted an essay on Facebook on May 11. He proposed paying every citizen a national dividend funded by surplus tax revenue from the semiconductor and AI boom. He cited Norway's Government Pension Fund Global as a precedent. No legislation was introduced. No committee was formed. No draft bill exists. The KOSPI fell as much as 5.1 percent intraday. Foreign investors sold approximately 5.7 trillion won in a single session. The Proposal Kim proposed redistributing revenue the government was already collecting.…