Recent studies take increasingly refined views of how socioeconomic conditions influence political behaviour. We add to this literature by exploring how voters' prospective evaluations of long-term economic and social opportunities relate to electoral contestation versus the stabilization of the political-economic system underpinning the knowledge society. Using survey data from eight West European countries, we show that positive prospects are associated with higher support for mainstream parties (incumbents and opposition) and lower support for radical parties on all levels of material well-being. Our results support the idea that ‘aspirational voters’ with positive evaluations of opportunities (for themselves or their children) represent an important stabilizing force in advanced democratic capitalism. However, we also highlight the importance of radical party support among ‘apprehensive voters’, who are economically secure but perceive a lack of long-term opportunities. To assess the implications of these findings, we discuss the relative importance of these groups across different countries.