Haiti was considered the Jewel of The Caribbean, and was the richest colony in the entire world when the French controlled it. Richer than any of the American colonies at the time. The whole reason the French wanted Haiti was because of it's natural resources. They exported more sugar than anywhere in the world.Haiti has basically no resources. What "favors" could they possibly offer us?
Now it's a seething mess...and not because of the earthquake. But you are correct, we certainly don't want or need Haitian "relief" workers assisting us should we have another natural disaster.