Perhaps I could of explained better and perhaps I misread the OP . Unless one is on an immigrant work program with a country like Australia or working for a multinational like Shell then the fall back is the land of our fathers, where ever that maybe.
I fully expect subject to the perils of life to end up in an old folks home in my home country.
If I was fired by my present employer and could not get another job then like most people I suspect I would return home, as you say domicile of origin.