This reminds me, Manmohan Singh is actually a very successful politician who has played his lack of ambition card perfectly. People who believe he is not doing what they want him to do, think he isn’t allowed to. Those who accuse him of doing something they believe he ought not to, assume he is under compulsion.
In other words, it’s been four years of being a PM with very little criticism. Pretending not to be a politician is a difficult trick — and he has done it quite well.