This neglects to state ... unrestricted immigration can buy us an out, for now, for in theory an maybe ~10 years. So this immigration solution gets us to maybe

This neglects to state ... unrestricted immigration can buy us an out, for now, for in theory an maybe ~10 years. So this immigration solution gets us to maybe 2035 or so. And even that is dependent on none of the South American and African countries actually improving. Living conditions in Mexico are rapidly approaching the level where immigration from Mexico will stop outright. Columbia is behind that, but not ridiculously so. Venezuela is an exception, but short of the current government starting a war ... and Brazil won't be providing the immigration numbers we need. Okay ... and then? I won't even reach retirement age until 2045, and I do hope to enjoy retirement for 20-30 years. By the time I kick the bucket, if I calculate right, we'd need ~1.5 times the size of the human population to immigrate to the west. I find this figure problematic. For one thing, that's more humans than the UN predicts will be alive at that time.