I don't think outsiders grasp how much of an impact the emphasis on "guanxi" and family relations has on everyday life in China. On one hand, you can see this as 90% of Chinese billionaires are the kids of high ranking officials.
Bot on the other hand, you can see this as 90% of Chinese kids of high ranking officials are expected to marry someone who is successful/will make them look good. Anyone who's dated an Chinese girl whose parents are relatively successful (especially if they are East Asian themselves) will probably tell you a thing or two about having to measure up to standards.
In Chinese society, people use their relationships to leverage life (and by extension, business and politics) to the full. Thus, it's not acceptable to marry below you because if you do, you may be forced to hire the relatives of your lowly mate. It is shameful if your family is not doing well, and it is shameful if your close relatives don't have a job. This is the cost of sticking together, having strong friendship and family bonds-- you do not want any relationships that are too one-sided or unsustainable.
While modernization has weakened this system nontrivially, it does feel that it is still the norm, and we have reason to believe it will continue (at least to a greater extent than here in the West). The reason is that China has too many people, too many mouths to feed. China produces many more engineering students than does the US. But most of them aren't hireable. There's a reason why we're still "better".
Finding the right talent in China is even more formidable than it is here, and it always has been, thanks to the fact that China has 3x more people per acre of arable land than the average country (cited from Stratfor but I can't find the link).
Now I'm not saying that the system is fair or even efficient compared to the Western system, but using the family to extend one's goals is a byproduct of Chinese society.
I would argue there is some wisdom in what they do. Here in the West, our HR departments often prefer to hire people who are referrals. There's an implicit understanding that good workers like to hang out with other people who are good workers. In this light, the Chinese are merely extending that wisdom beyond the workplace.