What drives partisan conflict and consensus on welfare state issues?

Left-right partisan conflict has been a key driver of welfare state expansion and retrenchment over time and across countries. Yet, we know very little about how left-right differences in party appeals vary across social policy domains. Why are some issues contentious while there is broad consensus on others? This paper starts from the simple premise that partisan conflict is a function of how popular a certain policy is. Based on this assumption, it argues that the left-right gap should be (1) larger for revenue-side issues than for expenditure-side issues, (2) larger for policies targeted at groups that are viewed as less deserving and (3) larger for more redistributive programs than less redistributive ones (e.g. means-tested versus earnings-related benefits). These expectations are tested on fine-grained policy data coded from 65 Austrian party manifestos issued between 1970 and 2017 (N = 18,219). The analysis strongly supports the revenue–expenditure hypothesis and the deservingness hypothesis, but not the redistribution hypothesis.