I'm curious what you mean by complementary workers.
In the example of immigrants doing hard manual labor, especially agricultural work, who are the complementary workers? I'd infer it's workers like the people who transport crops around or operate the machinery to plant / grow the crops, etc.
In the example of immigrants doing hard manual labor, especially agricultural work, who are the complementary workers? I'd infer it's workers like the people who transport crops around or operate the machinery to plant / grow the crops, etc.
Is that close to the meaning you intended?