Batman can only become a necessity for Gotham when good men like Jim Gordon fail to turn around corruption within the police ranks or even defeat the local mobsters. At the end of "Welcome Back, Jim Gordon," Gordon is basically friends with one of those mobsters and he is able to achieve a small victory against a corrupt cop.
But wait a second -- this is only the 13th episode of the first season. And once again, producers of Gotham choose to rush, rush, rush storylines involving the only non-corrupt cop in the whole city. Luckily, the Bruce/Alfred storyline continues to move at a glacier-like, yet fascinating, pace.