This is nothing that increased immigration can't solve. Immigration has insulated the US from the age curve that has afflicted most Western nations for generations.
We don't have factories lining the shores of the 3 rivers in Pittsburgh making coke, iron, and steel.
Bringing in hordes of uneducated masses does little for the US anymore, and Trump has turned off the only beneficial sources of immigration (educated) the US has - but this is also a limited resource.
We need people to pay taxes and provide services for the young and the elderly. In general, that requires a high trust environment. Wholesale importation of immigrants without a plan to integrate them into the environment is not a high trust environment. One (very probable) outcome is the large community of unintegrated immigrants will detach from the responsibilities being placed on them. At which point we also haven’t solved the demographic problem that immigration is supposed to solve.
Immigration is the one and only formula the United States has used to grow into the largest economy and among the highest standards of living in the world.
I'm not sure why you imagine this strategy is suddenly problematic.
"At which point we also haven’t solved the demographic problem that immigration is supposed to solve."
I also don't follow the logic of this line at all. Why would new immigrants working and paying taxes and having children not help the demographic situation?
