Does making more money mean we aren’t equal?

So a friend of mine is married - they have no children together but he has a child who visits a couple of days a week every week.

Husband works 2 jobs - mostly at home all day or on the road (but always working)

Wife works 2 jobs - one at the office 8am - 5:30pm Mon-Fri and works the second job while on the first job and after regular business hours and weekends.

Wife also cooks every day, cleans the house (deep clean twice a week), does laundry, bathes the dog, picks up step child every day as per the schedule, grocery shops by herself and she’s a part time student.

If she “slacks” off for any reason such as doesn’t make “good food” one day or forgets to wash the dishes or load the laundry - her husband gets LIVID! He tells her that she’s useless and cant manage to things normal women would be able to do and they aren’t equal because he makes 6 figures and she’s around $50k/yr.

he’s even told her once that he’d leave her for someone who would replace her because every women he’s been with has always tended to him.

I think it’s very unreasonable and disrespectful to compare income and since she doesn’t make half of what he makes, she’s automatically required to slave for him.

Does this seem normal?? Is it normal for men to think they aren’t equal because he makes more money?