A man who is seeking this type of power imbalance is a walking red flag.

And I promise you, I've met dozens of men who seek out younger women because they can't attract women their own age because of their lack of maturity.

If you're talking about old men who want a trophy wife, I suppose it can be said that he could potentially find a match in his own age group, and is choosing not to, but then he gets all bent out of shape when he finds out his younger woman only wants him for his money and he's unable to find the connection he's actually seeking.

It's red flags all the way around when a man can't or won't date an equal.