The analogy that I draw, to answer your question in respect of summary trials, is disciplinary court for federal inmates serving time in penitentiary.
Inmates in federal penitentiary are a different category: there is a need for speedy, expeditious discipline, and there are fewer protections for the person who's facing charges. However, even in penitentiary, people convicted of serious criminal offences who are facing the kind of trial that a summary trial is have the right to counsel. There is the right to have duty counsel present, it is a court of record, and there is an automatic right of appeal to the federal court, so in certain circumstances inmates are getting more rights than soldiers.