The net cost would be very small. There would be a planned period of increased activity prior and a period of make up after. And then you'd have 5 years of the economy running without a pandemic to make up any loss.
Substitute some other plan of coordinated action for the five weeks if you want. I don't care to argue about it, it's clear from New Zealand and Taiwan and so on that coordinated action works very well, if it is made to happen. It's also reasonably clear that it's cheaper than dealing with a raging pandemic.
So not only do you admit it would never happen, you cannot even provide any actual figures to support your claim. New Zealand and Taiwan have had success because they effectively eliminated the disease at the start of the pandemic, they didn't shut down with 30% of their population infected and millions of current infections, which is why that particular comparison is poor.
It isn't unreasonable to ask for justification of your claim that it'd be so much cheaper to shut down the global economy or take 'severe' action at this time. So, thanks for providing absolutely nothing beyond some vague claims about ideal actions that won't happen?
Substitute some other plan of coordinated action for the five weeks if you want. I don't care to argue about it, it's clear from New Zealand and Taiwan and so on that coordinated action works very well, if it is made to happen. It's also reasonably clear that it's cheaper than dealing with a raging pandemic.