Nothing to do with affording them.

Poor people in Western countries often have lots and lots of kids, whether it is in Toronto or Baltimore or Chicago or Paris or London.

What is actually going on you can see in Western cities as diverse as Auckland and Malmo and Amsterdam and Mannheim and Brussels and Windsor and Athens and Bolgna.

With modern cultural ways come low birth rates. The modern cultural ways include high rates of higher education for women, availability of birth control, pursuit by women of professional careers, choices of men and women to have multiple non-marriage relationships during their twenties and thirties, and greater focus on leisure and status and pricey bling among young adults than in the more family-oriented generation of a century ago.

Dropping birthrates have hit Western towns and cities for half a century, whether the cities were cheap, expensive, or average for cost of living, hitting Windsor and Trois Rivieres the same as Vancouver or Manhattan.