Yes, doing good for whom?

The novel makes the points that, when people came to Vito for help, "never were they disappointed." Later it says that "he got the idea that he ran his little world better" than the pezzanovanti in government.

Unless I miss my mark, the only good Michael did for individuals with no apparent strings attached was to make Jules medical director of his hotels, and keep Lucy on in some capacity--and that was only in the novel. He made a "magnificent endowment" to the State University in Nevada in II, but that was an institutional gift designed to help buy legitimacy. By III, he's literally throwing money at the Church and at Sicily--for the same purpose.