[seec]

I strongly disagree. I have experienced many very well-off people (middle class+) who consistently choose cheap crap because they refuse to think about their choices in any other ways than maximisation of their benefits (at a surface level).

Poor people are not necessarily the ones to make those choices. In fact, sometimes you find out that they are actually poorer than they would be if they would optimise their choices for their own financial benefits. If you look at who's buying expensive local food at your farmer's market it's unlikely to be dominated by rich people. If you go to some discount supermarket, you will most likely find a lot more well-off people, proportionally. Lidl is a supermarket chain that has terrible consequences, from treating their own employees badly to putting extreme pressure on the suppliers and its whole reason for existing is cheaper prices. Their biggest customer demographic is rich boomer.