That is the topic of my latest Bloomberg column, here is one excerpt:
When we make personal decisions, we usually compare a choice to the best possible alternative, not the worst. Imagine if you suggested to your spouse that you go out to the movies, and your spouse asked why that might be a good idea. It wouldn’t be much of an answer to say that the movie is better than the very worst show on television at home. Rather you should focus on comparing the movie to the next best thing you might do, like watching your favorite TV show or going to a new restaurant you want to try.
The upshot is that we should compare anti-poverty programs to other anti-poverty programs, and favor only the prioritized ones. But just how much of a priority does a program need to be?
One way to proceed is to ask: If we expand some programs, what is the most likely political response? It could be either lower spending in some other program or, in fact, raising taxes on the wealthy. But the evidence on the “fiscal gap” — the space between what the government owes and what it collects — suggests that the opportunity cost of expanding one transfer program is likely some government spending elsewhere, rather than expensive handbags for the wealthy.
Do read the whole thing.