Bit of history here....
Voice of people: Oi! Food manufacturers. We keep getting ill because you sell us old stock!
Government: They have a point. How about we make you put a date on it, like when it should be eaten by?
Food manufacturers: What? The processes! The packaging! The audit trail! It'll cost us a fortune! This is going to put prices up.
Voice of people: We don't want prices going up.
Government: Well, you do want safe food, so you'll have to pay a bit more.
Food manufacturers (amongst themselves, giggling): Fucking brilliant. We can get them to chuck everything away every week and buy it again. Hey, pull in that date a couple of days.
Shareholders: Whoo, the profits! Honestly, it's like scooping the stuff up in buckets off the pavement.
Voice of people: This smoked mackerel smells alright, but....ooh, not sure.