Why Married People are Richer than Single Individuals

I’ve never been married. I am single. And no. Getting married to become richer isn’t in any of my plans. However, why is it that married people are indeed richer than single individuals? Here are a few points that I see. Let me see if you agree with me.

Married individuals’s costs are paid by two individuals. For example, the house rent or mortgage is paid off by two individuals thus making it cheaper than if only one individual does all the payments.

Married individuals are much more motivated. The married individual
could be working better gor the family, or working better for the children.

Married individuals don’t eat out often. Instead of going out on dates, they spend more time at home.

Two earners mean more income. This is basic math.

Married individuals can check up on one another. One could remind the other when overspending. It’s much more common to make mistakes when you’re single because of this.

Do you believe that married couples are much richer than single individuals? If yes, why?