Those costs are debatable.
One would need to consider the demographics of the people who elect to have abortions. The majority of women getting abortions are of lower socioeconomic stature – who may chose abortion due financial reasons. One might argue that those children would actually be a burden to the economy.
Freakonomics by Steven D. Levitt and Stephen J. Dubner. Argue that legalized abortion had the benefit of dramatically lowering the inner-city crime rate. It’s certainly a debatable point. Many people have presented data that opposes this conclusion.
By those argument, perhaps people who get a abortions should receive tax credits for the beneficial impact to society.
Given the demographics of the situation, some believe that legalized abortion is tantamount to racial genocide.
What is not considered is the morality of the situation. When you consider that you are killing a living thing, with fingers, toes, and beating heart, perhaps the penalty should be something more than a tax.

abortions lower the unemployment rate? How do you figure? The demand for labor is a derived demand. That means, it is derived from the demand for the product or service that person produces. If there is less people, there is less demand for all products. That’s chapter 3 in economic textbooks. The more people in the economy, in general, means greater growth. There are situation where this doesn’t work because of the lack of education in countries. Recall, education is the key to long-term growth. If we had much higher education standards, we could care for a lot more people. But, since the average person is educated underneath the high school level, we find that more people=more burdens. If you want less abortions, tax abortions. That will lower abortions. But, it is not at all clear on how much. Maybe 5%? Who knows? Also, the idea of taxing activities we believe harm society in general are the hallmark of our tax system. We tax negative externalites and spend the revenues on things that produce positive externalites. That’s how taxes work, in general.

Actually those children would probably been raised unloved by parents who didn’t want them. They would be in prison and costing us even more money. The cost of building schools and roads etc would be higher because we would need more. We would destroy even more of the environment so that they would have places to live and places to increase farming so they could eat. Because overpopulation seems to increase antisocial behavior we would have to pay more cops to try to control all the domestic violence.
I believe it would cost more.

wow, where do you get your funny math. Abortions are gross so I don’t recommend them, but unless you think that unwanted children are going to grow up and become just great adults, I don’t see how you get there. A lot would just end up in jail and we would have to support them. Thus just being a drain on society.

We could also increase our GDP by annexing Mexico. Their cumulative GDP since abortion was made legal in the US exceeds 35 trillion.

Maybe we should it make it mandatory that every woman have at least 2-3 children. Maybe that would even it out a bit.

you could just as validly argue that abortion levels over the past 35 years has kept unemployment down