Executives of several of Milwaukee’s high-profile arts groups have stepped down recently, leaving something of a power void at the top levels of the city’s cultural scene. The latest to resign is Judy Smith of the Sharon Lynne Wilson Center for the Arts, who has reportedly been exhausted by a massive fundraising effort she was spearheading. In fact, many of the Milwaukee execs have left their posts not because of controversy or dissatisfaction with their work, but because they were simply burned out by the intensive fundraising work required during an economic downturn.