PR-STV differs from other PR systems in that it allows the voter to decide the issues that should matter for him or her. In most PR systems, the voter can only influence a single aspect - party representation. STV allows the voter to choose other criteria that can be used to create the proportionality: the voters' assessment of his or her preferences for the candidates is most importantly based on the voters' expectations of how the candidate would act and vote if elected, and that might be influenced by the character, ethnicity, age, place of residence or gender as examples. A perceived problem arises from the fact that voters and the political elite are often not in accord with what sort of proportionality should be achieved. Increased voter choice and control reduces the power and influence of the political elite to determine the political debate.