There are cases where that makes sense. If a woman sacrifices equally in the lean years, she should profit equally in the good years.
A good example is when a wife takes on a job (or two) to put her husband through medical school. The wife puts her own career aside to further her husband's career.
Later the husband is a successful doctor, and there is a divorce. Shouldn't the wife get a share of her ex-husband's income?
Just like Betty Broderick
A few decades ago the US military noticed a disturbing trend in their retirees. They would divorce their spouse shortly before retirement and pick up a new toy for their new life.
The spouse who had followed them around the world and not had a chance to build any sort of career, (although they usually had jobs) was left with nothing.
They changed the rules so that if you had been married to your spouse for 10 years of your career they got half of your retirement and medical insurance.
The number of dumped spouses dropped dramatically.