I don’t play the lottery but I’ve never really understood the math against it. It’s a negative expected value, sure, but it also produces a (small) probability of a high return. The math against it seems to hinge on the idea that people should maximize the expected value of their wealth.

But, an alternative goal is to maximize your probability of qualitative changes up, and minimize the probability of qualitative changes down, for your living conditions. If somebody is in a situation where they can spend a qualitatively inconsequential amount of money on lotteries, then playing the lottery is a rational way of maximizing this metric, right?

Of course, it does add the hard-to-quantify risk that they’ll become addicted to gambling and start spending a qualitatively meaningful amount of money gambling!

OTOH if we as a society all started putting a small percentage of our wealth toward the lottery we’re essentially misallocating whatever that percentage was. So it produces a somehow less efficient economy I guess. So maybe there’s a social bias against it.