I will explain. I have been through two total economy collapses in my life. My country collapsed twice, once in 91, when the communist regime was overthrown, and again in 97, when total financial collapse, plus social unrest happen.
In 91 there was violence, but few deaths. But I remember I had to stay in line for bread, at 10 yo, pushing and shoving to buy some, otherwise no food for me and my family. This wasn't not because we didn't have money, but because there was no food. Since everything was provided by the government, and the government seized to exist, things got really bad.
The EU had to step in, and help us with basic necessities that year.
Then in 97, happen a total economic collapse. A huge ponzi scheme (think Madoff x3), where a lot of people of an already poor country, lost a lot of money, and the government was corruptly involved in it.
A huge unrest unraveled. The government send in the army to quell it but the soldiers were demoralized and refused to fight their own people, and just left. Army depots got looted, almost everybody ended up with AK-47s, grenades, you name it.
There were no cops in the streets, you were on your own. Businesses will get looted, people that had money will be sent letters to pay money or they would be kidnapped.
In the huge unrest, looting, settling of scores, and all the chaos, about 2000k people died, in the span of 3 months.
Eventually a new government got formed, and things calmed down. Economy rebounded the next year, and things are getting better.
Now, you might think this doesn't happen in the US, but I should just remember you that Katrina was only few years ago, and look at the rape and pillaging that happen then. The LA rioting was only 18 years ago. Things like this can happen even in the us.
If you have no money, b/c your bank failed, your credit card doesn't work, your are desperate, something got to give.
Desperation = people doing crazy things.