The consequence will be that our civilization does NOT collapse, the world will NOT end.
If we don't reopen the economy, the looming disaster will be far, far worse than anything the virus could ever cause.
If we continue this quarantine, it will be the literal end of the world. The food supply chain will break down, leaving everyone living anywhere but farms or hunting cabins to starve. The pharmaceutical supply chain will break down meaning that people who need medication to stay healthy will not have any such medication.
As the economic situation continues to collapse, people won't be able to pay their utilities. And that means that utility companies won't be able to make payroll or pay the costs of running their power plants (i.e. fuel and maintenance). Thus the power grid will fail. No power = no refrigeration, no heat in the winter, no air conditioning in the deep south in the summer where it is a matter of life and death for the elderly.
No power also means water treatment facilities shut down, especially if people can't pay their water bills to defray the cost of treating the water. So, we run into a shortage of drinkable water.
If the quarantine continues, the world-wide survivors of the apocalypse that is coming will number in millions, or maybe even just the thousands. If the quarantine continues, the resulting collapse WILL be TEOTWAWKI. (The End of The World as We Know it.) If you continue the quarantine, we're talking nearly the entire population of the United States dead by this time next year.