I think the phrase "The reason for starting the bounty:" is needed right before that reason is stated whenever anyone starts the bounty. Take a look here - when I was starting the bounty it really didn't have enough detail there. However, now the question is already answered - even though the bounty hasn't been awarded yet - and there are more than enough detail. Yet the ugly "The current answers do not contain enough detail" in the blue field under the question body states something which is no longer true. Thus, if anyone comes to look at that question's page now, especially a newcomer, he will be confused.
It would be better if it said:
The reason for starting the bounty: The current answers do not contain enough detail
or if it were put in the Past Tense:
The reason for starting the bounty: The provided answers didn't contain enough detail
Something like that.