Denmark has built one of the most comprehensive machine learning-powered welfare auditing systems in the world, Wired reports. In a joint investigation with Lighthouse Reports, the publications discovered through public records requests that, to prevent fraud, Denmark’s Public Benefits Administration has access to nine state databases containing citizens’ personal information including tax, property and employment data. The scale of personal data collected by the PBA has been scrutinized by the Danish Institute of Human Rights and Denmark’s data protection authority, Datatilsynet, who say the practice is "disproportionate" to the amount of fraud committed.