If they both want to work, then child care should be affordable for the dual income family. Generally it's not which is why schools are required to fill that care gap and be in sync with working hours.
Doubly so if "affordable for the parents" means "affordable for parents who are in the same income bracket as your average pre school teacher."
Source: I've served on the board of a day care.
The other piece of the puzzle though is that there need to be sufficient providers, which can't happen instantaneously. So you'd have to scale up such an initiative in a sensible way.