Money traps on Retiring abroad

I wouldn't be surprised to find that many people return their home country after living their early retirement abroad.
Expats who are still U.S. citizens are subject to most of the same income tax requirements as folks back home, and they must still file a return annually with the Internal Revenue Service on all money earned in the U.S.  including income withdrawn from retirement accounts. I heard people after all their hardwork they wanted to use their money wisely they become thinking to live back home because the money they got  from their retirement is enought for living. I have relatives retire and live there in PH. the couple are both have a good job then they retire and living  in Ph.  which is good because they have a good benefits their both works in the U.S  government before. now living in a big house and retirement they enjoy it because their both working hard.