this is going to sound really harsh, but from what you said, this post is in NO WAY an "inspiration". Yes, money cannot buy happiness, but I don't see any direct relevance of that to this post because we're mainly focusing on his issues with his parents.
The only way he can resolve his situation is to really sit down and talk to his parents about his feelings instead of hiding his feelings all the time. Yes, his parents' neglect might seem extremely unfair and uncaring, but no outsiders have any right to judge them. this problem is between your friend and his parents, and unless he confronts them and faces the problem instead of being all upset about it, nothing is going to change and in the long term there's just going to be more hearts broken and hatred and misunderstanding.
as his friend, you should offer him support and listen to him if he needs, but you shouldn't encourage his negative feelings in any way. i'm not saying you are, i'm just stating that friends should be supporting, but should also remain as neutral as possible and encourage him to solve the problem instead of running away from it.
this might sound very cliche, but there are many people who suffer from far worse than this. there are people here who have their parents divorced or hate each other; some grow up in broken families, and some don't even have parent(s). if your friend is to continue to take that for granted and whine about it still after all these years, then he is simply naive and ungrateful.
i hope your friend would be able to sort out this problem soon.
