What did abraham lincoln mean when he said, "wringing their bread from the sweat of other men’s "?

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.  

they died because of a disease during the first spanish colonies.