SAP also owns Fieldglass, the largest HR software suite used globally today. If anyone is a temp, contingent, freelancer or 1099 in the vast majority of companies or has billing based on said work utilized through SAP back office integration the data is centralized in said platform. Essentially, SAP has more personal data on about as many people globally as GOOG or FB bc it records voluntary identification data up to and including name, address, SSN, personal ID, bank #, W2, etc etc etc etc
Combine this with the workday integration and they have an exhuberant amount of intel reach