Well, obviously. If what you want to spend your marginal income on is more consumption, that's completely reasonable. There's no accounting for preferences. Tha

Well, obviously. If what you want to spend your marginal income on is more consumption, that's completely reasonable. There's no accounting for preferences. That's not what I, the article, or anyone else in this thread is talking about though. Note that I'm also talking about a _floor_, not about discretionary income. What you consider "must-have basics" is different from what I would consider to be so, which is different from what a billionaire or a villager below the global poverty line would. To some degree this is normal, but the degree to which it gets in the way of the other goals of the people I'm talking about, I don't understand it. I'm specifically talking about the many, _many_ friends of mine who have goals other than immediate consumption, and for whom immediate consumption is preventing those goals even when those other goals are higher-priority. Yes, I know revealed preferences are a thing, but in extremis the concept relies on a completely unrealistic Homo Economicus model of people. Hyperbolic discounting, innumeracy, an innate desire to keep up with the Joneses even when you disavow any such desire: these are all surely contributors, but I guess I'm surprised at the degree to which their sum skews consumption behavior.