I.e., anybody who does expect me to return the silver will soon be a nobody. Although Nostromo recoiled from killing Monygham to cover his own whereabouts, he becomes "threatening" for the sake of covering the silver's. Continuing on the deeper level, the line means that the People will kill rather than submit to social exploitation again.

The corpse of Hirsch, representing violence, has "come nearer" as the dialogue proceeds to subtle threats of death.