That is based on the biased and ignorant assumption that the marriage did not contribute in any way, shape or form on the husband's current benefits.
Let's say the ex-wife cooked and cleaned. If they divorce, he no longer has access to that.
And let's say the man was the sole breadwinner. Why should the wife continue to benefit from his money when he is no longer benefiting from her cooking and cleaning?
Ex-wives should have to get a job and not use the government to force their ex-husbands to support them. That turns men into lifelong serfs of their greedy (and often cheating as well!) ex-wives.
Right now a woman has every incentive to leave her husband, take his money, force him to support her, and fuck the pool boy.
If that were so, you'd be able to present positive evidence to support your claim. At least anecdotally, current divorce laws do not seem to disincentive rich husbands from leaving their wives.
The evidence you need are divorce laws themselves, esp. when they give the ex-wife half the ex-husband's assets, plus alimony which is life-long is some states.
There was a case in New York where a rich man got divorced. A feminist judge awarded ungodly sums of money to the greedy, cheating ex-wife even though they had an actual pre-nup according to which she was not supposed to get it. So a man cannot even be protected with a prenup from getting ripped off in divorce.
Or look at Jeff Bezos' greedy ex. She will become a billionaire but it wasn't her who started Amazon.