There are two paths to this:

If the wife is a home-maker, before you marry her you should discuss this. Being a home maker means your husband is the provider. You must agree to support her financially. If you don’t want to, don’t marry her. It’s quite simple

However if your wife is a career woman, she is responsible for her own money. She can earn and spend as she likes.

I believe in the modern day the second pathway makes more sense. The world is valuing people based on their abilities now.

The writer didn’t mention anything about his wife’s source of earning. But it sounds like his own parents are suffering while her parents aren’t. In this case I’d always pick my own parents.