Tonga has a few cash crops, fish and coral, some other sea produce. They have tourism, and some minor agriculture imports.
By far however Tonga gets most of its national income from remittances (gifts) sent from Tongans overseas. Western Union makes alot of money there.
by flighting overseas to get the money from the bank
By working
Singapore earns money from overseas by exporting products like computer parts, electronics and chemicals.
80 dollars an hour
They export coconut products, nonu fruit, and fish to overseas countries.
Because of the money that could be earn. And lost cost labour
Russians earn money buy exporting things that they produce like oil, coal, precious metals, grain,vegetables and fruits.
Tonga is. But Samoa is Bigger than Tonga.
With exports and investments, and with remittances from family members who live and work overseas, who contribute to the wellbeing and every day life of the aiga (family) back home.
Samoan family members who work overseas, send money back home to Samoa to help with the running of the family, and any big events that pop up, things like funerals, weddings, 21st, etc, etc, and generally help out with anything.
I'm not sure what you mean by the overseas thing, or if it makes a difference. Most all retirement savings in thr US are nly tax deferred anyway...you don'tay the tax on the money you save when you earn it, but you do pay it when you withdraw it at retirement.
Through exports, and also through remittances from family members who work overseas, and who contribute to the aiga (family) in every way.