First, I have to say that I think the little sick boy, Dick maybe has some parallels to Charles Dickens in real life as a boy. Dick is part of Dickens. Charles Dickens as a boy has to stop school and be independent at age 12. Oliver at 11 (I think). Maybe Charles Dickens felt distraught and hopeless when he was that young. Maybe he thought that he would rather die young than go through the misery of being poor and working your whole life.
Anyway, the next thought is the old addage, nature vs. nurture. Oliver's inner character is sweet, kind and timid. No matter what environment he is put in he still shows those qualities. Oliver is taken advantage of with the Jew and is appreciated when he is with Brownlow.
Mr. Brownlow has an inner turmoil with Oliver's behavior. He stated that he is alone now, and he heart has been broken, but it is not closed. He wants to give Oliver a chance in his heart. I think that it was admirable that he took out that reward to find out what happened to Oliver, but it surprises me that he would believe the first person who showed up with a story for him (even though it is a preacher). The housekeeper will probably needle Mr. Brownlow to give the situation a chance.
It is a shame that Oliver was going to wake up the people during the robbery, but got shot first. Dickens let good prevail last time when Oliver was caught injustly for pickpocketing.
I thought that Mr. Bumble was a crude man. He, of course, was cruel to the orphan's, but he was also a low life thief too. He wanted to get all he could out of Mr. Brownlow for the information about Oliver. Remember that the monastaries also had the burden of the poverty population, if not by taxes, but by placing them in homes in their communities.