Nostromo hears this as a successful prophecy, but there is another reading in which Giorgio might repeat it as an accusation.

It also continues the suggestion that Nostromo has returned from death; that his adventure caused the death of his "Capataz" persona, the former loyal self. Finally, there is an allegorical level in which the spirit of material betterment believed that the People would return to society -- after all, that is where "riches" are to be found.