Tonga is a constitutional monarchy. It is the only remaining indigenous monarchy in the Pacific islands (see also Hawai’i). Reverence for the monarch replaces that held in earlier centuries for the sacred paramount chief, the Tuʻi Tonga. Criticism of the monarch is held to be contrary to Tongan culture and etiquette. Tonga provides for its citizens a free and mandatory education for all, secondary education with only nominal fees, and foreign-funded scholarships for postsecondary education.

The prodemocracy movement in Tonga promotes reforms, including better representation in the Parliament for the majority of commoners, and better accountability in matters of state. An overthrow of the monarchy is not part of the movement, and the institution of monarchy continues to hold popular support, even while reforms are advocated. Until recently, the governance issue was generally ignored by the leaders of other countries, but major aid donors and neighbours New Zealand and Australia are now expressing concerns about some Tongan government actions.
https://en.wikipedia.org/wiki/Tonga