On the other hand, centralization increases bureaucracy and corruption. Humans are still humans and their memory is limited, which means that they can still onl

On the other hand, centralization increases bureaucracy and corruption. Humans are still humans and their memory is limited, which means that they can still only pay attention to X number of politicians. If you increase the number of politicians far beyond X then they can get away with all kinds of things. This also leads to a decrease of the system handling people's specific needs since there's a larger disconnect between the ruling class and the people.