The OP wanted to know a good use for a dead mall. It was not stipulated that it must be financially viable, realistic, or whether it makes sense.
Seriously, I'm struggling to see how this even makes sense. A good use for a mall that is totally unrealistic isn't really a very good use, is it? Otherwise we could all come up with all sorts of grand ideas ideas that would be lots of fun if it weren't for tedious realities like, you know, reality. Safety, funding, basic practicality. But hey, let's have the homeless sleeping in this unit and turn everything around it into a honking great water park for underprivileged kids and the upstairs floor into a community garden. Someone else can figure out how to make it all actually work.
Never mind, I'm sure the local planning department would enjoy a good laugh at ideas that have no basis in reality and are completely unworkable.
And what insult? Politicians and businessmen are money-oriented, and I've never seen two men discuss dead malls so much in my life. I'm trying to make sense of all this.
I'm not sure how else to read your last line. Assuming I'd "rather talk money than the good" - you can't do much of anything without funding. It's not an either-or situation. If you want to do good with an abandoned mall you still need money. As I said if you don't pay your bills your programs go away very quickly however much good they might be trying to do.
And who would have thought that in a thread about dead malls people might discuss dead malls?