Lyric discussion by svc 

Cover art for The Beat lyrics by Elvis Costello

One possible clue is that "Standard Leader" was a rank in the SS. In light of all his other references to fascism, it seems significant. If nothing else, I can't figure out another way to make that line make sense.

Similarly: -- "Vigilantes...out to collar me" -- "On the beat" -- "Your friends," which strikes me as a reference to the vigilantes -- "Though you never enjoy, such a pleasure to employ," and you know, "swallow me" -- Most of the last verse

This all strikes me as a conversation between an authority figure and some person that he is sexually abusing.