But accidents happens. Does the child need to pay for that accident?

Even if one is not pro-choice, there is always adoption. If you know that you cannot afford to raise a child, what could be better for the child than to give it up for adoption to a couple who can afford to raise it? There are thousands of couples who cannot have children of their own that are waiting and hoping to adopt one and these couples can afford to give the child a good life. If one is pregnant and cannot afford to raise the child but keeps it anyway, this is a selfish decision and not in the best interests of the child.

Having a baby is not only a matter of money. Will you prevent a poor couple to have a child even if they desperatly want one?

This sounds like what got us into the current financial meltdown - everyone desrves to own their own home (even if they cannot afford it). People have to learn to be responsible enough to live within their means. This is even more important when one decides to have a child because that decision now affects two people instead of one.