The middle class make their own decision to borrow a decade's salary because that's better than paying the decade's salary on rent and not owning the house at the end of it.
I think an immediate option with real benefits would be to provide a small tax advantage for businesses to allow remote/hybrid work. Obviously not everyone can do this, but for those that can, they could live where they can afford to and stop spending hours a day driving to and from an office. Personally, I work at an AEC firm that requires physical presence; however, I have had nearly zero productive in-person interactions in the office. The design team is in another state. Meetings are on MS Teams even when everyone is a few feet aeay from each other. If I talk to anyone, it's purely for the relief of the distraction it provides. I spend no less than 10hr a week commuting.