When I was working for a division of a very large U.S. company purchasing would buy floor sweepings just to save a buck.
I suspect buying from a reputable supplier and insisted on traceability would go a long way toward at least greatly minimizing this problem.
Long overdue. But the last paragraph of the story contains the bad news. It's sad that with the political climate in Washington being what it is and the general election looming (albeit in five months) even a slam dunk issue like this one probably won't get the attention it deserves in a timely manner.