"Countries who move their capitals to smaller cities tend to have more balanced urban systems, and, as a corollary, more even economic development."
"The interaction between the large capital's business and policy communities and the national leaders cause the latter to mistake the good of the city with that of the nation."
"But we may also ask, does a country even need a capital city anymore? With the long term shift away from central authorities like monarchs to pluralistic democratic institutions, multiple branches of government, and decentralisation to provinces and municipalities, there is little reason to retain the conceit of a single, enduring seat of power."
Quotes from here