Taxation of retirement income

I have not been able to find anything about the taxation of retirement income in Tonga.  I did see that personal income tax was set in the amount of 10%, but is that also true for say, social security?

Welcome to Expat.com Dragon1!

Hope that you'll soon be enlightened.;)

Harmonie.

My wife and I wish to retire in simple home to buy in Tonga just outside of the capital, we are in our 60's and 50's, we are wondering what is the best health insurance for us as an expat from the US?