People
Military justice is to justice what military music is to music.
— Groucho Marx

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The comparison uses military music to cast doubt on military justice. It implies that adding the same adjective changes both things in an unwelcome way. The balanced wording delivers the criticism indirectly, leaving the listener to supply the unflattering judgment that links the two halves.
Context reviewed