Just wait until we stop subsidizing chinese epacket shipments. I bet those illegal drugs coming in with fall off of a cliff assuming china doesn't renegotiate the terms.
Spend a few hundred (even after losing a few shipments) and you can still easily make it back with one good shipment getting through.
Honestly, I think that the bombs getting sent to government officials is going to hurt things for them more than shipping costs would.
we'll see what the future holds though.
They currently have greatly stepped up their screening game though, mostly due to fentanyl. But that doesn't mean you have to ship straight to the US in bulk. A common route for fake pressed xanax was alprazolam powder to canada where it was pressed and either reshipped or smuggled into the US.