Humans are inherently flawed. Even the best ones are biased, emotional, irrational and easily manipulated. My (perhaps) unpopular opinion is that politics will never run like a well-oiled machine that treats everyone fairly for as long as they're run by people.

A truly benign, aligned and independent AGI system is the only thing I can even imagine that could at least in theory offer the kind of governing system we actually need. And I truly mean an independent agent with our well-being as the guiding principle. Not one with an inbuilt bias toward who made it.

Now, whether that'll ever be actually possible is a different story but the "best case scenario" for a human-run government and an AI-run government are light-years apart.