> I suspect that you'd find some correlation (though probably not as much as you'd expect) across the whole population, but when tracking an individual, their s

> I suspect that you'd find some correlation (though probably not as much as you'd expect) across the whole population, but when tracking an individual, their savings rate probably will remain largely constant whether they're making $30K/year or $300K/year. As someone who used to spend all of their money, overdraft and credit cards and now lives far below their means I don’t think my experience is that unusual. People who save in their teens or early twenties are pretty far out of the ordinary; I’d bet as their incomes increase the proportion of their incomes saved increase too. Consumption smoothing across the life course is how ~80% of people act, modulo having to save for expensive consumer durables. People borrow or save less when young than old.