JOSH EDELSON/AFP via Getty Images) Even as they promise AI will supercharge productivity, tech leaders are sending a clear message: any efficiency gains won’t help individual workers. During a podcast appearance last month, OpenAI CEO Sam Altman said that he doesn’t “expect AI” to lead to a shorter four-hour work week. He argued that workers are “secretly” going to be “happy” about being “much busier” and working even harder thanks to AI — a bizarre and ou