Interesting. That kind of musical motif pops up occasionally in music meant to elicit a traditional dance or religious ceremony, as Benoit is clearly trying to do here. It seems to represent the ritualistic and somewhat cyclical nature of the progression: dancer moves in one direction then turns around and goes back, then repeats. Big bands utilize repetition in a similar way owing to the fact they came into existence as dance bands, but the patterns that seem to be common in anime big band scores also elicit a similar precise pattern more indicative of ritual dance. In this specific case, it might be indicative of Lupin's "dance" specifically with Zenegata or, more generally, with his "dance" with mainstream society in general.