Exactly this director of Lowood school ruined the first impression about Jane and her healthy life there. He is from that type of man who cares about himself, his needs and desires. He likes people who have a lot of money, because they can give it to him, sorry, to his school, obviously (really, to him). After an epidemic of typhus in Lowood, people started searching for the reason of such a low amount of funding and medicine, that is why he was brought to light and all his dishonest was showed to the public. And finally, we see when the truth triumphed.
Mr. Brocklehurst in the Essays