> If the plan is to reduce pension costs it seems to work.

We don't know. Covid19 leaves some people with long-term, perhaps permanent damage. You might lose working-age tax-paying people from workforce, having to pay them disability allowance, and this might offset part or all of your savings in pensions.

Taking years is generally the case with long term strategies.

You're assuming current understandings of herd immunity and epidemiology are correct, which by empirical observation they aren't.

The epidemic is already over in Sweden:

https://en.wikipedia.org/wiki/COVID-19_pandemic_in_Sweden#De...

(more up to date graph: https://lockdownsceptics.org/wp-content/uploads/2020/06/IMG_...)

Yet a much lower level of infected population than conventionally understood has been reached. The models that assume the virus will continue to grow until 60%-70% have been infected are therefore wrong, reality itself is proving that.

There are now a whole lot of theories being explored as to why this is.

[edit: someone complained about the original graph link not matching worldometers. It's worldometers that's wrong so I replaced it with a Wikipedia link, which sources its data direct from Swedish health authorities. I left the lockdownsceptics link because it's a bit fresher]

I don’t know where “lockdown sceptics” got their data from but for me the current numbers look like a constant infection rate and only slightly reduced death rate that is also not falling: https://www.worldometers.info/coronavirus/country/sweden/