I think this is blatantly unethical, but also stupid. By creating a speculative bubble fueled by low interest and moderate to high inflation, these people will put themselves upside down in their holdings. Meanwhile this drives up homelessness (plenty of tent cities popped up near me as rents and housing prices skyrocketed) which will drive political instability and increase crime as people become desperate.

Edit: one more thought, this also really hurts people who priced carefully by increasing their property tax and insurance rates by no fault of their own.