The article says 10 employees and contractors accepted the bribes but this seems to be focused on those paying. I hope they also go after those accepting the bribes.
One idea I’ve seen is that it should be legal to accept a bribe but not offer or solicit one. On taking the bribe, your legal protection is conditional on handing over the bribe to the appropriate authorities. There’s still some game theory at work, but you’ve at least given people that are susceptible to bribes some additional power.