* Being poor reduces raw cognitive capability including memory and decision making.
* Being poor increases stress, leads to bad decisions and short term thinking.
* Even relative poverty can have this effect. It may be because social status is so important factor in human well-being.
It used to be a joke that you can remove poverty by giving people money. It was common to think that patronizing is the only way because poor are lazy bums and lower beings who need to be managed. Same data with same correlations as before. It's just the direction of causality that may need to change.