YYA> They don’t care because they don’t care. If Chareidim wouldn’t have large families ???, do you seriously think the Chilonim would in any way change their lifestyle
Population issue was (is?) part of Zionist discourse. Government would use more resources to subsidize larger families. Maybe even more than now, as now “subsidies for Nth child” is a code word for paying charedim and, thus, controversial. Would this work? I am not sure – it seems that world experience with encouraging more children by money is not working well. But I am explicitly comparing this with Charedim/IDF. If ISrael were to rely on a charedi army right now – that also would not be easy.