Actually in Bono's case, I'd make an exception to a wish for the Cabinet to ignore entertainers. He's used the leisure rock-stardom afforded to become a policy wonk on African development. A great bleeding-heart cause, but he's taken positions in favor of small-scale capitalism as a necessary part of development. Strom Thurmond was greatly impressed by his positions and support for them and helped shepherd some of Bono's ideas through Congress.
Jesse Helms got on well with as well.