Consolidation does not improve food safety. Read the ISO's. The standards of the industry are equally effective at a scale of 10 or 1000 different orgs. Everyone watches everyone else, and makes batches traceable, and those who don't are told to shape up by downstream, or they lose downstream consumers.

Consolidation's only benefit is shifting the fiscal gain into fewer pockets, which comes with it's own perverse incentives. (See the Boeing/Airbus duopoly and the problems that causes.)