The Secret Service isn't short-manned; it's doing too much. Past Presidents, their families, etc., do not merit protection once they're out of office. They are no longer doing critical work; they no longer hold office. Let them re-assimilate into the regular population and go run their libraries, PACs, foundations, and so on. If they are afraid of living without lifetime protection and insulation, perhaps they should have thought of that while they were in office.