The big take home is that any access to USA aid will be dependent on the recipient's enthusiasm for ending human trafficking. This makes ample sense. it is quite measurable in the sense that exported victims can be tracked and that is something all will do. Countries of origin can then be brought up on those numbers. At the same time, it provides profound leverage for internal organizations who are fighting the problem.
Not perfect of course, but it all increases costs for the traffickers.
There is no reason that the developed world cannot be made profoundly hostile. Of course, we also need to make the whole sex industry in particular legal in terms of adult participation. That still leaves the problem of juvenile predation by traffickers. Yet it removes the majority of the trade from the criminal operations.
It also means that the legal market will have a market to protect and a natural ally of enforcement.
Criminalization of human vice has never worked terribly well, but market minimization through legalization and regulation has a good track record.
The key is minimization as in no tobacco ads. It cannot completely end the problem but it can hugely reduce it to only the most determined..