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> Global population can't just "go up",

It can and it currently is increasing towards what is expected to be a peak and then a decline.

You typed "we need more efficient people" - I responded that efficiency has increased in the past decades.

> Efficiently gains, which is what I said...

I'm not seeing where you typed that.

> We'd be better off with 6 billion people

We have a point of agreement.

> incredible amount of elderly people to take care of, that puts a huge burden on younger people.

Perhaps less than you think, I'm > 60 and I barely take care of my father born in 1935 .. he delivers Meals on Wheels to those ederly that are less able.

There's a lot of scope for bored retiree's to be hired at low cost to hang out with less able elders, reducing the numbers of young people actually required.



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