I've heard a lot of my foreign born collegues do that. After they've reached a certain seniority, they decide to go back to their country of birth while keeping

I've heard a lot of my foreign born collegues do that. After they've reached a certain seniority, they decide to go back to their country of birth while keeping similar compensation, essentially making them very rich in their home country. I've only seen this work for Indian and Chinese born nationals though, where the home country has good relations with the US (as opposed to, say Iraninans, who don't have the option of going back).