Rich countries don't need as many children. We used to need kids to work in the fields as farm hands, to crawl on their bellies into coal mines. Well, kids are more like luxury objects now.

You know, throughout the world, throughout history, when countries get rich, they stop having kids.

You need somebody to support the retirees. You need to pay into the pension plans. You need people to work at the hospitals, at the nursing homes.

Half of Americans look at the other half and say, they're too lazy or they're not willing to get up and go to school. And the other half looks and sees a bunch of fat cats and talks about income inequality.

It's a good thing we have immigrant doctors and immigrant engineers, because if you or I get sick this afternoon, we're going to go to the hospital, and we're going to hope someone serves us.

Rich countries don't need as many children. We used to need kids to work in the fields as farm hands, to crawl on their bellies into coal mines. Well, kids are more like luxury objects now.

We're prosperous enough that we can afford to have one in six able-bodied men of working age sitting at home playing video games.