Currently watching 2000 mules, and a Thought occurred to me. We should EASILY be able to identify every mule in the country.
2000Mules.com
It's simple, they got paid. Meaning they had to deposit tens of thousands of dollars into their bank accounts that they couldn't account for. It's so simple that the banks could easily turn these people over to the IRS and start the rabbit hole. I know this won't happen as things currently are, but this is how simple it would be to find all of these people.
Eh, the paranoid ones would have stuffed it into their mattresses