I wonder sometimes if the kid is, on the other hand, just trying to get the attention of the often-absent parent, my friend, that is why he is acting spoiled and a know-it-all when my friend is around to get her/his attention (although I think the kid is also like this even if my friend is in one of her/his business trips). But then, when my friend is not around at home, her/his spouse is, although wife/hubby is also an office-worker during the day. And maybe since wife/hubby is only at home usually at night during weekdays, and I do not know how often she/he is at home with the kid during weekends, her/his caring for the kid is still not enough. Maybe this spouse of my friend is actually kind of influencing the kid to be a braggart because she/he himself is sometimes, too. She/he is earning lesser than my friend, and she/he certainly is enjoying a lot of things from the earnings of my friend. And from what I have heard, the spouse of my friends brings to the office many things to give away after almost each trip of my friend, even sometimes without her/his consent.
Oh, well, I hope my friend and her/his spouse wake up soon enough to the fact that their kid is growing up to be a spoiled brat. Money is not everything, especially when it comes to bringing up a child who should have good manners and right conduct that will help carry him through to adulthood.