Well, the principle of the matter for one and some have personal courage. Also, what you propose radically changes society for the worse. If Tesco can't assume

Well, the principle of the matter for one and some have personal courage. Also, what you propose radically changes society for the worse. If Tesco can't assume a high trust environment to sell their goods, they will implement policies to protect themselves that are more expensive/less convenient for everyone. Thomas Sowell has written extensively about this.