A corporate artificial intelligence frenzy is sowing fear for workers on a massive scale. Seventy-one percent of people in the U.S., according to a Reuters poll on A.I., are concerned “too many people will lose jobs.” Wall Street and Big Tech are running a huge hype machine to back up their massive, risky investment in A.I., pledging it will drive a “productivity surge,” meaning fewer workers and more profits. But workers can take heart that, so far, it’s mostly hot air. To date, A.I. is making few profits.