It doesn't "add a flaw", but instead it triggers the instability that exists because of the existing flaws. If large amounts of people stop being able to keep their heads above water (which is happening because of CoVID-related layoffs and reduced business) then their accumulated debt can crush them. Very few people in the US can survive in such poor economic conditions for "4-8 months" -- more than 60% of Americans can't cover a $1000 emergency[1]!
This is why many people are arguing for (and some countries have instituted) debt and rent cancellation for this period of time. That helps avoid tipping the scale and crushing a large portion of the population under the mountains of debt they already have. The US is also quite unique (in the worst possible way) in the massive amounts of medical and student loan debt that folks are saddled with.
The thing I am worried about is that as the US goes ahead and helps its own people by essentially printing money, the rest of the world is getting crushed.
If many countries see their currency completely failing, they may be forced to look for radical changes. Which could mean some countries decide they must try to move away from the dollar as reserve. And that's the type of thing that could lead to a global war.
So I really, really hope that people are aware that money needs to work for everyone and act accordingly.
Personally I believe that there are fundamental structural issues with the current system, and it needs an upgrade to correct those issues and to be much more technologically sophisticated. The new system must also have sustainability as one of its core tenets.
What I think will happen is more countries crashing and burning, followed by half-assed sovereign debt relief. Whether we actually get to a world war, who knows.
I only meant that the virus event doesn't add any fundamental flaw.