What are your thoughts and feelings about John Oliver forgiving $15 million dollars of medical debt?

I just read that John Oliver bought $15 million of bad medical debt of about 9000 people for $60 thousand .

I’m curious what people think of not just this act, but the fact that the market makes it so easy for so much debt to be “bought” at such a rate, including debts that are no longer legally collectable, along with their personal information (without much oversight or verification).