The (not-so-hidden) agenda for raising fertility rates

According to the INE, Chile's fertility rate will reach 1.5 children per woman in 2022. This figure is the lowest in Latin America and similar to rates in European countries.

It is argued that this figure is not 'sustainable' in the long term and that the fertility rate should be at least 2.1 children per woman. What 'sustainable' means to those behind the fertility increase agenda is