Critique My World's Political System for Plausibility

You've designed a government for your world and it sounds good until someone pokes it. Describe the system and its tech level and get a critique on the incentives it creates, where it contradicts itself, and the consequences you haven't followed through. Good for worldbuilders who want their politics to survive a sharp reader's questions.

I have designed a political system for my fictional world. Please critique it for internal plausibility, hidden contradictions, and missed consequences.

Here is my political system:
{POLITICAL_SYSTEM_DESCRIPTION}

The world's tech level is approximately: {TECH_LEVEL} (e.g., medieval, early industrial, post-scarcity).

In your critique, address:
1. What incentive structures does this system create, and do they match how the system is supposed to work?
2. Which group is most likely to destabilise or exploit this system, and why?
3. What historical real-world analogue is closest, and what can I learn from how that system eventually changed or collapsed?
4. Name one element that is genuinely original or interesting and worth keeping.
5. Suggest one specific structural change that would make the system more believable without fundamentally altering my vision.

Be honest. I want rigorous feedback, not validation.