This risk is likely to be greatest for childless households and in countries where the first-tier UB system has relatively low coverage or short duration of benefits. An insufficiently responsive SA system may raise equity concerns, but it also raises the risk that workers experiencing long-term unemployment during a deep recession will drift onto other income replacement benefits, such as disability benefits (see Box 1.3), that are characterised by very low exit rates, even when labour market conditions are good. Unfortunately, the most recent income data available at the household level for the majority of OECD countries are for the reference year 2008 and hence cannot be used to assess the performance of income support programmes during the Great Recession.45 However, 2009 data are available for two countries: Current Population Survey (CPS) data for the United States and Household Income and Labour Dynamics in Australia (HILDA) survey for Australia.