"Both" of these problems? The problem is dealing in human beings, right? What's the other problem?
Am I proposing that the tools to solve human trafficking go away? I wouldn't put it that way. Lots of societal progress comes with trade-offs. There will certainly be challenges for law enforcement but I'm confident they'll solve them.
The world isn't going to descend into a chaotic state of everyone buying and selling everyone else just because free-trade becomes ubiquitous.
The OP said "Can we find a way to help law enforcement police at the very least the really, really bad stuff," I think you're eliding his entire concern when you just say "I'm confident they'll solve them"