A conspiracy indictment was brought last week against a Los Angeles company, alleging forced labor on a chilling scale. Six contractors are accused of a scheme to hold 400 workers from Thailand in virtual slavery on farms in Hawaii and Washington State. The Justice Department says it is the largest human-trafficking case ever brought by the federal government. Just as disturbing is how familiar the accusations are...To lose a guest-worker job means irreparable harm: destitution, unpayable debt, the loss of mortgaged family land. Under those conditions, a worker will accept any abuse, live and work in squalor and do what he is told...[A] vast enforcement gap persists...Thousands in the undocumented work force toil unprotected. The Global Horizons case is only the beginning.