Hmmm... What if a wide variety of economic actors have somehow managed to slurp up all the surplus that previously went to "paying it forward" in terms of raising children?
Rent is a common complaint, but consider the costs of childcare, needing two incomes to stay afloat, etc.
The high cost of childcare also largely comes back to high rents. The management needs to pay for the space, and pay workers enough to afford to live within commuting distance. There are of course other costs to running a day care center (utilities, insurance, supplies) but rent is a major factor here.