Why is "being too rich" a crime in China?

https://www.theatlantic.com/international/archive/2013/01/why-do-chinese-billionaires-keep-ending-up-in-prison/272633/

https://www.scmp.com/news/china/politics/article/3002015/chinas-former-energy-chief-nur-bekri-accused-family-style?utm_source=quora&utm_medium=referral
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