One of the things that forces a rich country to open its doors to immigrants is the need to find people to do work that their own population is unwilling or unable to do. And increasingly in the developed world, one of the jobs that people are unwilling or unable to do is that of a parent. With the exception of Israel, no country in the OECD has a birth rate above replacement rate — 2.1 births per woman. Even countries like France and Hungary, which have spent large sums to encourage people to have bigger families, have not managed to get above this pivotal figure.
迫使一个富裕国家向移民打开大门的因素之一是这个国家需要找人来从事本国人不愿意做或不能胜任的工作。而在发达国家,越来越多的人不愿意做或不能胜任的工作就是生儿育女。