The correct answer to this open question is the following.
Majority faction a serious problem for popular governments because factions are groups formed because they have persona agendas and interests. A majority faction would act in its own interests, sacrificing public or popular interests in order to get benefits or legislation that support their agendas. Most of the time these factions are formed by power people and wealthy businessmen that tried to influence governments and legislations yo act in their favor and against the popular consent.