Sure, I'll say it explicitly! Government employees are supposed to avoid not only conflicts of interest, but the appearance of conflicts of interest. https://www.lawinsider.com/dictionary/appearance-of-a-confli...

If you are working for the government on relations with a particular country, and your son gets a job paying $750,000 a year working at the biggest company in that country, then you need to resign or get your son to resign.

Please let me know if you want further clarifications.