Paul Handley, author of a certain book, has an article* about royal succession in Foreign Policy:

European constitutional monarchies have the obvious solution to this problem. Brits, for example, may dislike or feel somewhat apathetic to Prince Charles, but in England elected leaders and parliament runs the show, ensuring the country is not vulnerable to the often tragic capriciousness of royal succession.

Thailand has not made that step. The fight that has persisted for much of the past decade is about if, how, and when it will.

BP: Suthep’s People Assembly plan is even a further move away from electoral democracy. If Suthep succeeds and we get a People’s Assembly, we get a PM who is appointed by the King – despite the changing semantics that the PM would be sponsored and not appointed by HM the King – which then makes royal succession even more important as the power of who gets to be PM is with the monarch…

*You will need to use Google to find the article as it is not legally possible to link to it…