They're just becoming the slaves that Americans won't become. < /sarcasm>
It always just boils down to the almighty dollar doesn't it?
Have you seen any of the LEO intel reports saying that the characteristics and foot soldiers of the drug trade are being shifted to the Slave Trade?
So far it is less risky (regarding legal consequences) to deal in illicit human cargo than it is to deal drugs, and easily as lucrative. Crooks can be dumb, but not blind.