The Washington Post editorial board on Friday lambasted Seattle’s socialist Mayor Katie Wilson for dismissive comments regarding the city’s exodus of wealthy residents and growing taxpayer frustration over soaring rates. “Nine days after winning Seattle’s November mayoral election, Katie Wilson joined Starbucks baristas on a picket line and pledged to boycott the coffee conglomerate until their union got its way. “The socialist will need to wait a while longer for her caffeine fix,” the board  wrote  in a scathing piece titled “Seattle’s mayor waves goodbye to prosperity.” The editorial highlighted the shifting business landscape, noting recent Starbucks store closures and the coffee giant’s announcement of a major expansion in Nashville, Tennessee — a move that will shift 2,000 jobs away from the Pacific Northwest. The board specifically pointed to Washington Gov. Bob Ferguson’s, D., new “millionaire’s tax,” which imposes a 9.9% rate on annual incomes exceeding $1 million.…