ST. LOUIS—In what appears to be a completely earnest attempt to revitalize a sluggish local economy, St. Louis mayor Francis G. Slay unveiled Thursday a detailed, ambitious, and truly depressing plan to turn his city into a major technology hub. “We’re going to show America, and the rest of world, just how innovative and cutting-edge St. Louis can be,” said the mayor, who displayed genuine optimism as he outlined a desperate strategy to woo major players in the high-tech sector with a sad little series of subsidies and tax incentives his city cannot afford. “When I look around St. Louis, I see nothing but possibility. Don’t be surprised if, within a few years, our crumbling warehouses are home to the nation’s hottest social media startups, and our abandoned rail yards are replaced with a world-class biotech research center. Get ready, because the future is happening right here!” The mayor ended his presentation by pleading with reporters to dub the hopelessly untenable project “St. Louis 2.0.”