and no the government does not inspect food for disaease. they issue guidlelines but companies often have even more strict guidlelines because they want to retain customers, not because they care about the states opinion on food safety.
Yes they do. For both disease and quality. In fact, IIRC, one issue left over from the Bush administration is he cut too much out of FDA inspections.http://www.fsis.usda.gov/http://www.foodsafety.gov/compliance/inspections/index.html
Not to mention the health code at restaraunts and other places, which is related. And yes FDA inspectors go out to these places.
At this point you might want to read about what the food industry was like in the era BEFORE the PFADA/FDA and USDA inspections. Might I suggest The Jungle by Upton Sinclair? Not the main point of the book, but its depiction of the meat industry is accurate for the time.