Nearly everyone that I know that has an extravagant lifestyle comes from a background where there is family money and gets supported financially by their parents as an adult.
One woman that I know, who is married with children, gets a monthly allowance from her father to buy clothes, hair extensions, get her nails done etc, and her father pays for 2 foreign holidays per year for them.
Another couple got their house bought for them by his parents, and her parents pay for their holidays, school fees for the kids, and anything that the kids need such as shoes, clothes, or toys.
These are just two of the examples of people that I know get money from parents. I don't come from a background of family money at all, but it seems that I'm in the minority.