For example, rising food prices tend to hurt the poor, especially the urban poor, who spend a large share of their income on food; unlike agricultural workers, they receive none of the benefits of higher food prices. With swelling urban populations, it will become increasingly difficult to keep a lid on these pressures.
很难预测什么会触发群众游行，但经济因素是关键的。比如，食品价格上涨会伤害贫民，特别是城市贫民，他们收入中的一大块都花在了视频上；而与农村劳动力不同，他们不能从食品价格上涨中获益。随着城市人口的膨胀，减轻他们的压力将变得越来越困难。