The problem is, as with many of the left's assumptions, is that there is nothing inherently wrong with a declining population. Sure, in the tribal days you would like your tribe to be bigger and therefore stronger than the other tribes, but since society no longer operates on the premise that "big" is always "better" the growth rate (positive or negative) of a population is moot.
Now of course I will be forced to waste the intelligent and intellectually honest people's time and provide the caveat to address the incredibly predictable claim that RAPID declines in population due to war, famine, plague,
First a slowly declining population is nothing to worry about. It doesn't mean you'll go extinct as people will always be willing to fornicate. And it doesn't mean the economy will collapse as there are less people the economy needs to support. Ergo, the focus should not be nominal economic growth, but rather the key and infinitely more important variable, GDP per capita. What are the standards of living the individual person is enjoying. Ergo, lets say Japan's economy shrinks an enormous 25% in the next 50 years. That's great if its population shrinks 50% because those people who remain just saw an enormous increase in their standards of living.
Second, logic would dictate that if a declining population is "bad" then a booming population is "good."
Like how the 2.8 billion people in China and India are all living at first world standards of living?
Like how Hispanics and Blacks have the highest birthing rates and (shock of shocks) also suffer the lowest standards of living in the US?
And let's not forget that sociologist's, SJW's, and social worker's utopian
Sorry, it's just not true, increasing populations WITHOUT commensurate or better economic growth just means increased poverty, suffering, and strife.
The truth is the left has ulterior motives for increasing the population perpetually. And it has nothing to with the unfounded concerns that "population decline is bad mmmkay?"
First, (though not leftist) companies and corporations want a perpetually increasing population so people buy more stuff. Nothing wrong with that on account purchasing and enjoying material things in life is part of goal of economics. But let's be clear, corporations and companies don't care if it's sustainable in the long run or if it's in the best financial interests of the population. This is why we have slowing economic growth, but booming debts. People are willing to borrow to pay for what they can't afford today. This not only boosts consumer spending (which profits companies), but it slows long term economic growth because said monies are NOT going into investments. Again, though not specifically leftists, this goal has nothing to do with preventing the "horrors" of a declining population, but is merely corporations trying to beat the previous quarters EPS.
Second, very much like how the private sector needs perpetual (though unsustainable) growth to increase their profits, the entire socialist economic/government system the left has installed in the US (and west) depends on future hosts for today's parasites. What I love the most is how the left tells people right to their face "Well we need future children to afford the social programs like social security and medicare!"
Shouldn't something in your brain be going off saying "Well where the hell did the old people's SS contributions go? Why is it behooved upon the youth to pay for the elderly?"
Of course, Westerners have become idiotic sheeple and just blindly agree saying, "Well yeah! We need more population growth in the future to afford all this sh!t we want to buy ourselves today!" But for those of us with half a brain we realize this is an admission and proof that the socialist's government/economic system is unsustainable and needs to parasite off of the future to make it SEEM like it's working today. Ergo, to keep up the facade they import as many new immigrants as possible with the the hope they'll be the willing slaves that will pay the taxes to support them in their old age (when in reality they don't produce anything as much as they parasite on welfare and other social programs making it laughable they will become the economic juggernaut that will make good on all those government IOU's and social welfare promises).
Third, perpetually increasing asset prices.
Since our entire retirement system is based on capital gains in the stock market, we need to, in theory, increase not only the demand for companies' goods and services (therefore driving up prices), but we need more purchasers of said assets to drive these prices up. This not only plays out in the stock market, but especially so in real estate in that more people directly drive up the rents and value of land.
But imagine if the population was declining. What would happen to asset prices?
Well stocks would tank, as would commodity prices, not to mention real estate. And since nearly every pension, trust fund, and American's 401k is dependent upon those prices why we just can't afford to have those drop now can we? So let's import a bunch of people who hate our guts and want to kills us, or at least live off of us, so our precious little government pensions and IRA accounts stay fully funded.
And finally, the blatant and painfully obvious attempt to stack the voting bloc deck with parasitic immigrants who will vote left because "welfare." Do not be fooled thinking the left is being charitable of kind. They couldn't care less about the immigrants just as they couldn't care less about the black community. They view and use these people as pawns in their political game to remain in political power, thereby avoiding any real work, suffering, or strife in life.
So the next time you have some idiot sociologist, politician, or leftist talk about the "horrors" of a declining population, please show them this little post, tell them they are a liar, and then tell them to have a cup of STFU.