Why is it that when a mans wife makes more income than then the husband almost always treats his wife poorly?

This happened for two of my uncles. Both didn’t make nearly as much money as their wife’s but for some reason treated them horribly?

This is a study done on the topic: www.cnbc.com/.../...eir-wives-make-more-money.html
Why is it that when a mans wife makes more income than then the husband almost always treats his wife poorly?
Why is it that when a mans wife makes more income than then the husband almost always treats his wife poorly?
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