One day, a person will realize that money runs the world. Money can be used to buy goods, buy experiences like vacations, make it easier to find and keep a girlfriend or boyfriend, buy politicians and affect the government, etc. Almost everything is possible if there is enough money.
The person will realize that they only have one life on this planet, and if they can't live it large, it's not worth living at all.
This realization will cause the person to live by this philosophy of "Money over Everything