What film making devices are employed to suggest that life is rough in District 12?

The movie starts by showing us two men, wearing lavish and expensive clothes, discussing the importance of hunger games. Later on, we see capital personnel, Effie Trinket, who has come to announce the tributes and again we see her dressed in expensive and superfluous clothing. The imagery of the capital people and the people of district twelve are polar opposites of each other. This imagery conveys the underlying theme that the districts aren’t as well kept and the government is taking more than it is giving.