You'd think so but in the past that hasn't always been the case. In the UK they had the tesco-horse-meat thing (meat was supposed to be beef) and in ireland there was a case where huge quantities of animal feed were contaminated and as a result meat from the animals was quite highly contaminated and there was a massive recall.
But that seems to be the exception not the rule. What percentage (0..1) of mass products (counting product line, not item) do you think fails your minimum QA?
I think at least this number fails my QA criteria [pollid:1018]
I think at most this number fails my QA criteria [pollid:1019]
(give 0.0 and 1.0 to see results)
Press Release
Edit: Soylent's Reply, provided by Trevor_Blake