Over the past decade, a large number of studies have shown that in advanced democracies policymakers are more likely to represent the preferences of high-income citizens than the preferences of low-income citizens. In a quest to understand this income bias in substantive representation, several authors have recently suggested that the persistent descriptive underrepresentation of low-income groups in policymaking institutions may explain why political decisions so frequently are skewed toward the preferences of the affluent. However, although this is a plausible explanation, many previous studies dealing with the consequences of descriptive representation have failed to find an effect of policymakers’ incomes or social class backgrounds on their behavior in office. In this essay, we argue that descriptive representation may indeed have an effect on policymaking, yet for it to be consequential three necessary conditions must be satisfied.