It only helps people who buy houses, agricultural produce, clothes, cars; eat at restaurants, stay at hotels, have roofs repaired, drive on roads, sell equipment, provide professional services, invest in stocks, use childcare, buy gasoline, use electricity, and are dependent upon a strong growing economy.
Hermits that live off the land in remote areas and never go into town probably don't benefit from immigrant labor as much.
All things that the markets would resolve on their own without cheap, severly underpaid and under supported workers. Next?