The reason is fairly straightforward. Power moves in social circles. It is the same reason why there aren't many lawyers who make it politically in China. Sec

The reason is fairly straightforward. Power moves in social circles. It is the same reason why there aren't many lawyers who make it politically in China. Secondly, support has to be nurtured, and potential candidates groomed by power brokers or king makers. These people act like VCs and are generally very conservative when it comes to investing their scarce political resources.