The wartime adventure setting is dropped and the main influence is not old serials so much as George Stevens’ film Gunga Din and pulp magazine characters like Doc Savage.
Spielberg and his crew were clearly inspired by the excellent 1939 adventure film “Gunga Din,” as many of “Temple of Doom’s” iconic moments are ripped directly from the film.
A boy's own adventure it may be, but a tremendously good one; the film is an obvious influence on Indiana Jones and the Temple of Doom , a significantly weaker film, and the same spirit that infects the best moments of Lucas and Spielberg's series is found all over Gunga Din.
Based on Rudyard Kipling's poem, Gunga Din has served as the inspiration for countless adventure yarns over the decades, not the least being Indiana Jones and the Temple of Doom.
Steven Spielberg was clearly inspired by this film, as huge chunks, including the collapsing rope bridge, made it into his Indiana Jones and the Temple of Doom (1984).
Gunga Din is no more or less abhorrent in its prejudices than is Indiana Jones and the Temple of Doom (same movie, fewer heroes) or Radio (or pretty much any Cuba Gooding Jr. film, actually), and what that says about us isn't cynical so much as it is perversely optimistic.