If ever there was a good example of a GREAT centralized state that is CHINA.
If Modi is going to come good on his election promises, he MUST centralize power within the ramshackle ponderous state.
Ashoka had a highly centralized state as did Akbar the Great.
Modern, first world PROSPEROUS France is another example of a highly centralized state.
Centralized states only become a problem, when the bureaucracy is inefficient and corrupted, and the central government is also aimless and corrupted.
Then in such a situation, the central government becomes a burden on the rest of the state.
Not unlike the CIA(narcotics) and Pentagon(endless Wars for Israel) on the American Federal state.