Author James Michener famously said of Hawaii’s nineteenth century New England missionaries that they went to the islands to do good and ended up doing very, very well. Washington commentator Mark Shields has likened those missionaries to many people who come to Washington—all starry-eyed with idealism upon their arrival but later fixated on the ongoing Beltway stampede for a share of the largess bestowed upon the city’s insiders as they combine government service with often-grubby private pursuits. Which calls to mind Huma Abedin, wife of the disgraced former congressman, Anthony Weiner, and a darling of former secretary of state Hillary...