https://en.wikipedia.org/wiki/List_of_countries_by_total_fer...
https://en.wikipedia.org/wiki/List_of_countries_by_total_fer...
This is overstated. The alarm was sounded on this 2 decades ago for several east Asian countries, but they're not on fire. They're fine. Old people die.
If the fertility rate mattered that much, they'd have scrambled to make any number of policy changes including better work-life balance (see: Japan, SK, China), or plain ol' immigration, but they don't because it simply does not matter. All the efforts have been completely half-assed (like tax benefits, cash).
Japan enacted new immigration policies last year to allow more migrants as well as improved parental leave.
South Korea has been in political turmoil for last year but lots of work is being done on immigration.
A wad of cash isn't going to help you of bed. Yeah they are going to die, but if you're not careful it's going to be a lot quicker and a lot more painful than you had hoped.