This study is based on the issue of government-voter congruence, which is widely accepted as one of the important indicators of the representation phenomenon, an indispensable element of democratic politics. Understanding the issue of government-voter congruence is of great importance in terms of understanding voter and party behaviours. According to the basic assumption of spatial theories of representation, voters vote for candidates and parties that are similar to them in descriptive terms and that they think are close to their own thoughts, attitudes and behaviours. It has also been demonstrated by the current empirical studies that the descriptive concordance or consensus on various political issues between voters and elected individuals or institutions, whether it is a candidate, a party, a parliament or a government, strengthens the representation and political legitimacy. However, the issue of government-voter congruence has not been adequately studied from a temporal perspective in the literature. This study will examine temporal trajectories of government-voter alignment on left-right ideological positioning in 12 Western countries governed by a democratic regime by analysing data culled from Comparative Political Data Set (CPDS) and World Values Survey (WVS) using time series analysis technique. This study, which does not aim to find causal relationships on government-voter congruence, only aims to obtain descriptive findings. Descriptive findings revealed that there is an increasing problem of ideological representation in some Western Democracies, especially after the 2000s.