The children ARE being saved. Look at the justice department press releases, click the >at the bottom of page, there's more than 1 page, just doesn't appear so at first glance.
https://www.justice.gov/humantrafficking/press-room?type%5Bpress_release%5D=press_release&type%5Bspeech%5D=speech&&topic%5B3941%5D=3941&organization=All