Those are great points and well stated. I hadn't looked at those things from those perspectives. In particular these hit home:

is it better to tax parents less (so they have to work fewer hours and can take care of their kids)

Taxing families and single parents more effectively robs them of time with their kids. I don't want that.

And the general idea behind your overpopulation statement. Punishing those that have or want children financially isn't the way. Making societal changes is.