In a theoretical closed-loop 3-person model, the farmer grows, the doctor treats, and the builder builds. The farmer can feed the other two, the doctor can treat the other two, and the builder can build for the other two, and in a micro-community they don't really need to pay each other. As we increase the number of people participating, the likelihood that each person would choose to work without being paid drops. That's why we see such degradation in economically affected areas; everyone could just work all day cleaning up, patching up buildings, etc. but they don't, because no one's paying them to do so.
I am not naive enough to believe that any amount of propaganda or state control could fix the money problem, but I am frustrated to be willing to participate in such a theoretical economy with no outlet for it besides helping people in whatever free time I have.
Resiliency against interruptions costs a lot of money: warehouses to store parts, logistics to rotate these parts, paying suppliers for these parts earlier than the parts are needed, waiting until you have enough cash to buy stuff outright...
The core point is: governments, businesses and individuals have historically always had these costs - but at least the Western world has been enjoying a couple decades without major interruptions like war on the home territory, oil crises or the looming threat of the Cold War getting hot (and causing interruptions as a result), which means everyone got incredibly complacent. After all, when there are no interruptions to expect in the near term, why spend cash in the near term to guard against them?
And so, when Corona hit, everyone got hit.
> Are the physical Hertz buildings going to crumble if the banks aren't satisfied? No, currency changing hands has nothing do with reality passively changing shape!
The existing buildings may not go crumbling, but planned/under-construction buildings are getting put on hold when the banks' income stream vanishes and as a result of that, in turn, the workers can't work, ... <insert recursive ripple effects here>.