Just try to imagine that you have got an absolute power in some way.. It doesn't matter how, maybe through a coup, from royal ancestry or as the result of mutual destruction of existing opposition. Which kind of political system would you prefer to create?
A variant of this, sometimes played with by Mensans, is that after one person describes their ideal system a second person gets to choose a role for the first person within that system. Things then become very messy as the implications dawn.
Corny example:
A: I would pick a monarchy. I've always wanted to be king/queen.
B: OK, monarchy it is. You are a peasant within the monarchy and one of the arrogant nobles has just noticed your daughter. Is it still your system of choice?
A: No, no, of course not. Umm - I pick a completely flat egalitarian system then. Nobody has any special ranks, privileges, entitlements and so forth.
B: OK, egalitarian it is. You are a megalomaniac within that flat system. You are sure that you know best. You crave power and you need to be the boss. Is it still your system of choice?
A: No, I guess not. Umm - I know - the golden rule - do unto others - will be the only rule in my system.
B: OK, golden rule it is. You are a masochist within that system, begging others to beat you. Every time you come upon a sadist they refuse to do it. Is it still your system of choice?
Crazy-making stuff.