There is aversion because there is prevalence. God, no one is saying that there isn't a merit based entrance and promotion system. But Officialdom has always been seen as a lucrative job through out Chinese history. The CCP didn't invent corruption. In fact, every dynasty down fall have corruption attributed to it in some way. See Ming and Qing.
In fact, if you ever watched any of the period dramas I alluded to, the "clean" offical was always the hero. The rarity. Even the good and fair officials lived lavishly when compared to commoners and accepted tributes. Tribute, now called bribe, has always been a part of Chinese officialdom.
You seem have no knowledge of Chinese history, or rather your knowledge of Chinese history seems to be limited to popular period TV dramas. Right, I suggest this easily accessible English language book by a respected historian.
You don't seem to grasp the concept that there is less portray of corruption in Western history because until very recently corruption was accepted as the normal way of governance. Let's highlight one passage in my previous post.
As in England, however, many people who derived personal benefit from the old spoils system strongly opposed the new idea. Some protested that the use of examinations to determine the fitness of candidates for office was Chinese, foreign, and, therefore, "un-American!" Consequently, it was not until 1883 that the proposal of l 868 was finally passed by the Congress.
Of course you won't see as much portray of corruption and anti-corruption in Western period drama because as late as 1883, it was accepted as the American Way!
That doesn't mean institutionalized corruption have gone away in western so-called democratic countries btw. Remember the Clinton family was bankrupt by the sex scandal legal troubles, now Clinton's hobby is collecting luxury watches. In today's China, he would certainly be disciplined if not prosecuted. Remember the party official whom got in trouble for wearing luxury watches?
In China, corruption has been recognized as a moral evil for thousands of years. So of course you'll see more history of anti-corruption effort. That doesn't mean all corruption were stamped out. When a dynasty becomes weak, corruption do get out of control. But unlike in the West, it was always recognized as wrong, and combated whenever possible.