They know this is a trend, it's been documented in many articles over the last decade at least.
They could make unannounced spot checks, they could do more quality control sampling, they could increase accountability by mandating manufacturing information and links to safety violation records be printed on drug labels. And so forth and so on.
Sometimes I feel as if the entire medical industry in the US, and especially the drug regulation culture, has its head in the clouds with either some form of regulatory capture and/or narcissistic feeling of impunity or disregard.
Several years ago there was an article in a major news outlet about generics, and how lower income individuals were more likely to to choose brand name drugs over generics. The entire article, with interviews with physicians and medical experts, was framed around this idea that lower income individuals were less educated and didn't understand that generics were "chemically exactly the same" as brand names. This was going on at the same time as all this adulteration and dangerous manufacturing of generics. Not once did they mention that the possibility that maybe lower income individuals had a realistic, healthy fear of being screwed over by inferior products and lack of real oversight from authorities who are supposed to protect them.
The entire article was like a snapshot of problems with healthcare in the US: impoverished individuals getting screwed over by credentialed, overprivileged individuals in authority positions who are more concerned about maintaining a fiction of superiority and regulatory capture benefits than actually thinking of protecting the individuals who actually need help.
It's like cargo cult medical regulation, but with motivated ignorance.
The FDA needs to focus more on safety and quality control and less on the murkier and more questionable topics around efficacy and gatekeeping access.