[ewestern]

Its best to punish only one side of a bribe arrangement -- usually, the one granting access in exchange for cash. The reason is that the more parties that have a strong incentive to keep the bribe arrangement a secret, the more likely it will remain a secret. This is especially true with poorer countries' police forces. If you punish the guy trying to get out of a traffic ticket, you just cement the corrupt cop's power. What you want to do is turn the bribe-taker's position into a very lonely one.