I'm not sure about the trains from VA, but the only staff that I'm aware of on the NEC is the LSA who is busy working in the cafe car. The conductor and assistant conductor have other duties and are not just standing around. Red caps are available at WAS and they'll carry your luggage onto the train and place it on the overhead rack or at the end of the car for you.That (staff standing by, doing nothing) also occurs often on the NE Corridor. For example, in DC, NEC trains originating in VA use the easternmost tracks, which require stepping up on a stool and then the stairs. Some passengers cannot do this without assistance, especially with luggage. It often falls to other passengers to help them, while train crew stand by doing nothing.