It is not the government's place to force lifestyles on people. There is plenty of information around on what constitutes a balanced and healthy diet; people should be left to make up their own minds about what they buy with their own money. In any case, loss leaders make very little difference to the overall price comparison between processed and fresh food. Fresh food like fruit, vegetables and raw meat is expensive because it will soon rot and so it incurs higher transport and storage costs than processed food with a long shelf life. If governments want to change the balance in costs, they would be better off putting a tax on the unhealthiest foods rather than interfering arbitrarily in the realm of the marketing.