Couldn't overwhelming the healthcare system also trigger this same economic event? There are a number of hospital systems that are for profit, and have shareholders. I would think images, or even just stories, of patients dying in the hallways without proper medical equipment would trigger economic panic.
Then you also have non-clinical positions in the hospital that are still operating to ensure the clinical can do their job: cleaning, food service, maintenance, if the isolation areas are overwhelmed, there's a good chance that they are unable to contain the virus, both clinical and non-clinical employees are at risk. And there are a lot of employees, both clinical and no, that work second jobs to make ends meet. If the economy is still operating in full, they are then going to those second jobs because they have to, and possibly carrying the virus with them.
There's really good answers, but I think in the situation that we have now, we will minimize a greater catastrophe, both medical and economic from happening.