Well I don’t agree with the premises so let’s go through them.
First, 40% unemployment. Even if we’re in a longer nationwide quarantine then 12 weeks, I wouldn’t expect unemployment of that magnitude. And it would go down relatively quickly. Not back to where it was in February of course but down from its high.
Next, chaos, violence, and looting. All are possible. I think it unlikely to be widespread. You’ve heard about toilet paper and hand sanitizer flying off the shelves? What you aren’t hearing about so much are the long lines outside gun stores. ‘Nuff said on that topic.
As for bank runs. Again possible, but given that the US can print money till it runs out of paper or digits in computers, it’s not going to be lasting.
Folks need to calm down. This is going to suck mightily. But not “Mad Max meets The Big Short meets World War Z” kind of suck.