An alternative solution, that this article weirdly doesn't touch on, is that the US could also shift policy to stop exporting recycling material. It'd be nice to encourage expanded recycling domestically but if that fails and if ~80% of exported material is going to end up improperly dumped then it'd be far more reasonable to just make sure it's properly dumped in the US.

Make the export of detritus illegal, send the excess to dumps, and if Americans deem this offensive then they can legislate additional subsidies for domestic recycling (even potentially becoming a net importer of detritus!).