Why is the salary of the President of the People's Republic of China so low? According to Wikipedia, the salary of the President of the People's Republic of China just ¥152,121 RMB ($22,000 USD). How can one of the most powerful man have such a low salary?

According to the plan, all civil servants will get a raise. The basic
monthly salary for national-level officials, who are the seven members
of the Standing Committee of the Political Bureau of the CPC Central
Committee, including President Xi Jinping, will increase from the
current 7,020 yuan ($1,130) to 11,385 yuan, a raise of about 60
percent.

http://www.chinadaily.com.cn/china/2015-01/20/content_19353528.htm

I am thinking the salary is so low that it would encourage officials to have a second job or take bribes in order to make ends meet. Is there a reason why the salary is being kept so low?