"We believe that the Central Personnel Data File was the targeted database, and that the hackers are now in possession of all personnel data for every federal employee, every federal retiree, and up to one million former federal employees."[21] Cox stated that the AFGE believes that the breach compromised military records, veterans' status information, addresses, dates of birth, job and pay history, health insurance and life insurance information, pension information, and data on age, gender, and race
https://en.wikipedia.org/wiki/Office_of_Personnel_Management_data_breach
Well there is one HUGELY convenient way to pick who they will blackmail and/or who they think will switch sides for cash. No wonder it was so easy for a Foreign Power (china) to take over. 2016 slowed them down a bit, but obviously they had more people on their payroll/side than people assumed