See "The Psychology of Espionage and Leaking in the Digital Age" [0] from the CIA for more on this. From the paper:

What Causes Someone to Spy or Leak?

"Crises and vulnerability together intensify emotions, undermine already compromised judgment, and galvanize impulses to seize opportunities to obtain escape or relief through ill-judged negative conduct. People in this state are ready targets for manipulation and recruitment for espionage. They are also primed for behavior such as leaking, if they believe it will bring them respite and reward."

[0] [PDF] https://www.cia.gov/library/center-for-the-study-of-intellig...