This has been going on in Russia on massive scale. For bribes officials sells anything including highly sensitive databases. Those were used to uncover various Kremlin-run assassins targeting oppositions. Then Ukrainian special services used those to target high-ranking Russian military officers. Russia tried to crack down on that but it just increased the database price tag.

Do you have sources for that? No problem if they're not in English.

If Putin didn't want bribery to go rampant he would set the example, and force other top leaders to do the same, but instead he flaunts his properties, yats, women that he enjoys; but it's probably a price too high for him to pay. I bet Xi Ping enjoys similar privileges but in much more private manner.