,,,Mayfield's father gave up life as a struggling cowboy and opened the family's first Dairy Queen in the late 1940s. Now, the younger Mayfield is lauded as the "King of Queens" by the Austin-American Statesman. And the King is taking on the federal government, accusing the Department of Labor of overstepping its authority by unilaterally raising the minimum salary employees must be paid to be exempt from overtime pay.... Mayfield has been locked in a battle with the Department of Labor for the last two years, suing for the right to offer his managers the compensation packages he sees fit....