As consumers, we want products that are safe for us and transparency from producers will be appreciated. In our day to day lives, we don't always have the time to check for background information on products before buying so we place trust on the stores.
I've seen a betrayal of this trust in an African country once. One manager of a retail store acquired expired goods from a relative and then people bought them. It was not until one customer noticed the poor quality and reported it, that the corruption was unearthed. He had been doing it for months by then.