... and? I'm really not sure what your point is. Bribing more than one person/group and dealing with probabilities is a normal state of affairs, what about it?
Bribing something like 500 people can get expensive, but more importantly its hard for 500 people to keep a secret. I don't think its a practical strategy or at least not an easy one.
Admittedly even with 5-10 accounts per employee that isn't general-purpose-small-PR-agency stuff, but on a state levels it's nothing. For reference, quick google says slightly over 1 million people in USA hold top security clearance.
Bribing 500 people is easy when you can choose your targets. Bribing a large specific group of diverse people with full secrecy, is a different story.
The moment someone leaks the jig is up, and at least some of the bribed group would probably be very ideologically opposed which makes them difficult to bribe.
