Yes, the current ideology of constantly increasing populations is not long term sustainable, not economically, nor climate wise or social.

You can describe it as a form of a Ponzi scheme, the idea is that we must increase populations so we can continue living on the current living standard, not a future increased living standard.

What would it take to get to an improved living standard according to the this ideology? Doubling of populations? Tripling?

> (...) the idea is that we must increase populations so we can continue living on the current living standard

Not necessarily. The drive to keep a positive population growth rate is the need to provide resources to maintain the older segment of the population without draining the resources of the economically active population, aka work force.

Reframing on what I already said. I include older generations in "we".

Reframing it does not address it's problem. It is not an issue of "quality of life". It's a problem of being unable to produce the goods and services required to maintain the older segment of the population, which are no longer able to generate income to provide for themselves and have an increasingly greater demand for healthcare.

That is an assumption that our means of production stays the same, but with technology it increases.

In a more and more high skilled society, increasing population can have the opposite effect, do everyone have the skills and knowledge to operate in high skill society? If not, who will feed them?

Combine this with automation and old truths about increasing population to maintain standard of living falls apart.

On top of that, what the lockdowns has showed us is that many jobs are not actually needed for having a functioning society.

Is that opinion common among experts?