People weren't actually "given equal amounts of food." People were given stamps that allowed them to purchase specific quantities of specific, rationed goods (sugar, butter, meat, etc.). They still had to pay money along with the stamps to purchase the foodstuffs. Which goods were rationed and how much people were allowed per month varied throughout the war (and into the 1950s). Pregnant women and young children were given a higher allowance for milk. Many things were not rationed, such as fruits, vegetables and wild game. People with higher caloric needs could supplement their diets with these items, either through collecting/growing/killing their own or by purchasing those items. Additionally, for those who could afford it, ration stamps were not required to be used at restaurants. The so-called "British Restaurants" offered very low-cost, nutritious and ration-free food and were very popular.