Raising awareness of existing supports and introducing a well-functioning feedback system - w hich would also help potential beneficiaries identify their needs - would improve the maintenance and actualisation of the database which is key to its effectiveness (Bah et al., Ultimately, the system could evolve into a rights-based social protection system that provides social benefits where they are needed. Its development was driven by the ADBs social protection strategy and key questions such as how much is spent on social protection in any given country', what are the programmes, who is covered and how can the implementation of social protection programmes be monitored (ADB, 2006, 2013 and 2016). As a rule of thumb, social spending totals calculated in line with the ADB methodology (as below) are likely to be a little lower than OECD data as the ADB data do not capture all public health spending for all countries - the SPI does not account for free universal public health services financed out of general taxation - and does not account for the impact of tax systems on social spending (Adema et al.,