All the West is in the same boat, i.e. Europe, US, Canada, Australia, Japan and S. Korea. We are all connected and even though we make fun of one another we all suffer from the same social issues.
The immigrant has become the cheap way that the shortfall in ones own birth rate can be filled with bodies that pay taxes and work in the factories. Many Western nations such as France and Germany would literally collapse within a few years without mass immigration because they do not have enough young people to sustain themselves. The tax base would shrink to the point where the system collapses.
So while the policy makers talk about curbing immigration and building walls, the truth is we are literally dependent on this to stay alive. Rather than address the social causes of a native low birth rate, we fix it on the cheap and fast with folks that culturally do not assimilate well, cause for a high crime rate, are poorly educated or fraudulent skilled labor (not really - only on a piece of paper they paid for). But it sort of works... and of course you’ll also see the culture of your nation change. It’ll become more like the places these people come from.
What do you expect?
Today if I decide to shack up with another dude and we both have high incomes, YOUR children will pay for our happy asses in our old age. YOU will pay for college, YOU will deal with the headaches, limitations on your career and personal life, and I/we will benefit from them just as you will in old age. The fact that if I choose to be childless will not really impact all these government run social programs medicare, social security your children will pay for.
There is no true incentive in having children.
In fact, in some places people are no longer even getting married. Why? Any benefit in doing such has been removed, all in the name of progressive, egalitarian, feminist, social justice nonsense. About 65% of all children born in France are out of marriage, and a large portion of folks never marry, even if they live together 20 years and have 1.36 children together.
https://www.statista.com/statistics/957229/births-out-of-wedlock-france/
There is a very serious and real disease literally killing us. This is a philosophical/ideological illness and our policy makers are doing ZERO to fix it. In fact, the policies pursued by such folks as those attending Davos fuel this problem. Children = CO2, population control...
It’s at a point where all you can do is attempt to protect your immediate family from this craziness, but you can’t stop the big wheels from turning anymore. That will require some event or force greater than you or I.
A temporary fix. It works for most part in USA, UK and Germany.
They're having problems in France and Sweden. This does not apply to Japan because they have no immigration so their economy is already suffering.
No more people we are full.
And everything you describe was and is being done on purpose by politicians voted in by the useful idiots who then wonder why everything is going south. These idiots can not even understand that they are responsible...directly...for societal rot.