Finally, we come to the redemption arc, as Phil tries to be a better person. So what if he was a sexual harraser for decades? After a few years he got his act together and that's all the matters, right? Well, let's take a closer look. When Phil starts doing altruistic errands around town, he knows that there are no long-term effects and it's not having any lasting change. The only tangible thing it accomplishes is making him the center of adoration, gratitude, and worship of every single person in town — and that's probably his true motivation.
For example, when he catches a young boy falling out of a tree and the child runs off in shock, Phil shouts after him "What do you say? You have never thanked me!" It's not just enough that he saved the boy, he wants the gratitude. Why else would he go to a ridiculous party every night to hear everyone praise and thank him for his good deeds? If it was enough to simply have helped someone, why would he purposefully put himself in a situation to be showered with adulation? He knows that's what's going to happen because he does it every night, so any modesty he feigns is also an act.
