In my family my parents almost don't choose anything for me and I don't almost anything for them yet I have good relationships with them and it does feel like we are equal
And I'm still 4 years from being an adult
"It all demands on when the child becomes mature as some never get mature"
No, money can't buy you happiness. Happiness lies in family, friends, loved ones and etc
But not having any money at all will cause unhappiness
So in my humble opinion an average person needs:
1.People to be with, love and be loved back
2.Just enough money to get on in life (People in most cases can't balance it out between money and friends)