Earlier quoted context omitted.
You can't individual financial education your way out of systemic poverty. Furthermore, the common pattern where poorer people spend money as soon as they get it is, in fact, rational when you look at it from their perspective rather than your own (which, as with most people attempting to moralize to poor people about their choices, appears to be a perspective of "you should be doing absolutely everything you can to…
There's also family situations where liquid savings are at risk of being spent by somebody else. I don't think the marshmallow test people factor that in, you'd need to have a third option where the kid waits dutifully for the extra marshmallow but it gets eaten by someone else in the meantime.
Employers especially don’t like when people break out of poverty, because as soon as they have a buffer they can make choices and bargain. So there’s a lot of deep pocket incentive to keep people in their place.