This is an objective way to look about it. One important element missing is how much we'd have to pay in economic loss if we ended the lockdown today....
Just think about it. Will life simply return to normal with everybody going to beaches, stores, parks etc if they know the risks giving the new awareness of the disease? What I'm saying is that there is a high chance of a recession from the fear alone (not saying "irrational fear", simply "fear") as people will stay home and take fewer risks as they normally would, with the associated economic damage. Many will simply refuse to go back to an office.
So when calculating the savings from ending the lockdown, you have to take in consideration our losses from people's voluntary self-quarantine until the pandemic is effectively over if ending the lockdown prematurely.
Factors we don't know include how behavior would change even without top down pressures (i.e. doing nothing will still damage economic output), and how long lockdowns can last before protests, riots, and full on civil war, how effective a lockdown would be, what pressure there will be on healthcare providers in each scenario (including say healthcare workers refusing to treat patients)
There's also the subjective view - we aren't robots, people aren't objective automatons, many of us play the lottery for example, despite on average ending up behind, because we value the idea that we could get rich more than the value of the money we'd save not playing it.
There's then the relative weighting -- who suffers from that 25% fall in GDP? We may be willing to accept a 0.1% chance that someone in our close family will die in a car this year for $50k of personal gain, but we won't accept a 50% chance for "the economy" gaining $100m, of which $99m will go to "the 1%".
A crashing GDP affects "the 1%" more in financial terms than the majority. On the other hand with no cash to pay
There's then the value of a life. To me, my life and my family's life is far more important than yours. That's human nature. In the trolley problem where the choice is between killing their child and diverting it to kill 2 anonymous KKK members, almost everyone will divert it. Will a typical 25 year old with no family, a minimum wage job, and no health insurance, be willing to lose their home and live on the streets for the next 10 years in the unlikely save an 80 year old billionaire who doesn't care about them?
Good points. There are too many variables, and unknown changes to said variables for us to predict an optimal long term policy for handling this.
Thinking of it as objectively as I can, I can't see a scenario where the country keeps functioning well with the massive, rapid number of deaths associated with Covid-19. I know people die by the thousands in car accidents and other things. But at least in the short term, the widespread panic from a novel disease in ~2x/day geometric growth with 0.5-1.0% death rate (at best) would far exceed in severity anything we've ever seen.
Imagine Italy with no lockdown, would that be conducive to a healthy, or just mildly impacted economy? I don't see it. We had time to act, we didn't, now every option is bad, and now we're feeling the pain of the "less bad" option.
Just think about it. Will life simply return to normal with everybody going to beaches, stores, parks etc if they know the risks giving the new awareness of the disease? What I'm saying is that there is a high chance of a recession from the fear alone (not saying "irrational fear", simply "fear") as people will stay home and take fewer risks as they normally would, with the associated economic damage. Many will simply refuse to go back to an office.
So when calculating the savings from ending the lockdown, you have to take in consideration our losses from people's voluntary self-quarantine until the pandemic is effectively over if ending the lockdown prematurely.