Property transparency
If any breakthrough is to be achieved to require government officials to declare their property, specific measures to monitor the properties of those whose spouses and children are overseas should be the focus of these efforts.
It isn't that the public lacks any trust in these officials. Thousands of corrupt officials have escaped overseas in recent decades, taking hundred billions of yuan with them and sending the message that such officials are likely to embezzle public funds or take bribes and then transfer their funds overseas.
They are publicly known as luoguan (naked officials) since they are alone in the Chinese mainland. The name itself bears some color of discrimination. Some local governments even have stipulations that these "naked officials" are barred from assuming top positions.