This is a very important issue. If you understand economics, then you understand that Social Policy drives Physical Policy. If we had not been destroying life through abortions for the past 3 decades then we would have a workforce that could support our current needs for Social Security.
But that assumes that all those children would grow up to be employed. Under a best-case scenario, they would all be adopted out to excellent parents. My guess is that a fair portion would not reach their full potential because of a dysfunctional family life. Combine that with a loss of manufacturing jobs (another thread, please!) and I doubt they would all become model citizens. What if most of them became drug-dealing murderers. Just as likely a scenario.
Not and excuse for abortion, mind you, but a rebuttal to the economic argument against abortion.