Earlier quoted context omitted.
Age restriction puts the burden and punishment on citizens. Your proposal to punish parents does the same. How about a solution that puts burden on corporations for once?
Because corporations don't have children? Incentivizing parents to parent aligns the obligation, agency, and responsibility. People who don't want that level of responsibility can not have children.
You are asking for society to bear the burdens of the people you want to change. That is bad policy.