Given the society's stance on education, I can't imagine too many are in the positon accept postions that would deal with sensitive data unless placed there by the organization. I know they have paid for education for some bethel members, but I doubt they are forward thinking enough to plant moles in government agencies.
The only reason the WT holds people's minds is by keeping them busy and focused on what they teach. I can see a JW that hears gossip at work passing that along, but I doubt the WT trains and tries to get people government jobs to act as informants.