California’s Legislature passed a bill Monday to create a government panel that would set wages for an estimated half-million fast food workers in the state, a first-in-the-U.S. approach to workplace regulation that labor union backers hope will spread nationally. The bill, known as the Fast Act, would establish a panel with members appointed by the governor and legislative leaders composed of workers, union representatives, employers and business advocates. They would set hourly wages of up to $22 for fast food workers starting next year and can increase them annually by the same rate as the consumer-price index, up to a...