It’s a very good thing that you want to make your marriage work but it shouldn’t be at the cost of your self-respect. What your wife is doing is wrong. She shouldn’t insult you because she earns more than you. If you don’t want any further fights then you can have an effective conversation with her on this matter. And if you still feel like there is no improvement in the situation then you both can go for marriage counseling. It will help you both to cope with the situation and might develop a better understanding.