Over the last two decades, a horde of high-paid techies and restrictive housing policies have driven up real estate prices in Silicon Valley to dizzying heights. It is nearly impossible for the janitors, cafeteria servers, shuttle drivers, and other low-wage workers who kept tech campuses running before the pandemic to afford housing within an hour’s drive of the Valley. Apple declined interview requests for the story, but a spokeswoman noted that the company also donates fruit from its orchards to a local food pantry.