Some thoughts on the economic irrationality and political demagoguery of the phrase:
The problem with the “if it saves just one life” standard, other than being outlandishly stupid, is that it fails to take into account scarcity, which is fundamental to the human condition. Are 200 lives worth $2 billion? Of course they are; life is priceless. But scarcity is real. There are very good reasons that we do not require, for example, that all of the safety features found on the $100,000 Mercedes-Benz S-Class sedan be made mandatory on all vehicles. Would doing save even one life? Yes, it probably would save many lives: While President Obama attempts to derive political benefit from fear-mongering about violent crime, which has been in a long and steady decline, automotive deaths are a much more significant problem. Reducing automotive deaths by one-third would save as many lives as eliminating all murders involving firearms.
If you want to follow that line of thought a little farther down the rabbit hole, consider that the number of children killed in back-over accidents annually is less than the number of people struck by subway cars in New York City in a typical year. Should we retrofit the nation’s metros with barriers? It would save lives.
Someone should write a book about this sort of trade off.
In addition to the other critique, it’s also worth pointing out the ever-present hypocrisy of the Left. Banning abortion would save not just a single life, but millions of lives per year. What’s stopping them?