Is greater income a way for people to compensate for their lack of contribution to relationships in other ways?

This question could theoretically apply to either men or women, but it mostly applies to men who feel the need to be the main bread winners.

So my actual question is: In a relationship in which the man has greater income, does that income compensate for his lack of contribution in other ways to the relationship. Is it a means of control; bribery? What else does he bring to the table?

Why would a man feel emasculated or embarrassed by the fact that his partner happened to have greater income?
Why wouldn't he be proud of the fact that such a bright, ambitious woman saw outstanding qualities in him besides income?
And what other contributions does he bring to the relationship?
For that matter, what value do both men and women bring to relationships?
Is greater income a way for people to compensate for their lack of contribution to relationships in other ways?
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