You sound very bitter about your father's choice of a marriage partner. Your father felt she was contributing - at least in the beginning.
I have been thinking along the lines of coconutt. I don't think it is bitter. It is reality and a good topic to discuss.
For example, why should a woman just kick back, hire maid service, join the country club, have her pedicures and manicures, shop at Nordstroms, etc. while living off her husband's hard-earned wages. Then walking off with half of her husband's income after a divorce. How fair is that? I'm not talking about the women who raise children, volunteer in hard working ways, cook, do accounting, remain a faithful partner, etc.
This could be either a woman or a man -- men could also stay home and play. You can blame the man/woman for marrying them but it doesn't make it fair.
E.g. Rush married Marta for ~10 yrs. If (yes, IF) she got 50% of his income (in some states) if, (again, IF) she didn't work. How fair is that? Why should any non-working spouse get half? Rush had his business long before Marta came along.