As a Chinese, I would say something about the politic.China has a very specail politic system. If you want to do politic stuff, you must get good education(now minimum is a master degree) and takes exam to become government employee, communist are prefered in the exam. Then if you are capble and have done your work perfectly, which measured by KPI, you are wathed and audited a long time by CCP to make sure you are not corrupted and decent.Then you are likely to be promoted to a member of the commit(with 9 members)which makes policy, The commit discuss and vote all the governing stuff,with the advise from economists and experts. Then your are still proved to be good, you can go upper government commit. So here is the thing, to be a governor must proves himself capable by objective KPI, it takes almost lifetime to defeat peers. Even with nepotism advantage, Xi started this carrer in 17th, but at very old age to get that position. we do have democracy, different from western style.Didn't see the disadvantage yet,but it really works well in China