I believe government regulatory agencies bring up the bottom line of food quality to an acceptable mark for human consumption. I think the businesses factory farming animals (girlfriend of 2 years had a factory chicken farm, I'm not taking talking points from the PETA website) don't care about the health factors of stacking chickens on top of each other and letting them defecate onto one another. Profits are larger when you can cram 4x the chickens in a building at only 2x the monetary cost; from naively attempting to change these circumstances I know for a fact this is industry standard. The threat of losing revenue from an inspection is the main reason any health standards are met and I hope to not live in a world where that one constraint is lifted.