In the hypothetical that someone agreed to slavery to avoid certain death (and death that would have occurred regardless of the slave owner), then yes - the sla

In the hypothetical that someone agreed to slavery to avoid certain death (and death that would have occurred regardless of the slave owner), then yes - the slave owner has helped the slave. The same applies to your other examples. You and I are currently paying billions of low skill workers exactly $0/hour. Why are we morally blameless, but the person offering $3/hour is a villain?