Along with term limits that’s mentioned in another thread, make insider trading illegal for all sitting politicians. This is one of the reasons our government is failing and people become lifetime politicians is because it’s an easy way to get rich. They have inside information on upcoming events no one else does and uses that to their advantage. See Nancy Pelosi.
Politians are easily corrupted and compromised. They should be audited yearly and if they make over a certain threshold $500k (for example) it triggers an immediate investigation into the earnings.