It may not be all upbringing, but to an extent it is. Compared to our generation, or at least where I grew up in Mississippi, there was not a lot of material things to give to children in those days. Parents could not afford it. Here are some things I have noticed since my generation, having raised my kids now.
1. Parents buying a child a car, sometimes new one.
2. Lavish gifts at Christmas, birthdays, sometimes thousands of dollars.
3. Not having to work after school for those extras one wants.
4. Not helping with chores at the house, such as the yard and keeping rooms clean.
5. Not much family time, going to and fro
6. Going to watered down, entertainment oriented churches when they go.
7. Not eating at home much, eating out on demand. It used to be a treat.
8. Multiple vacations every year.
9. Loss of respect for teachers, principles, or church leaders, and parents taking up for the brats they are raising.
10. Being promoted in school to the next grade with an F average.
Many other things could be listed, but it all forms an atmosphere in 18 years that says, I can have what I want, when I want it without consequence, and without paying. It shows we are raising self centered brats without any sense of responsibility.