> It’s counter intuitive but it’s roughly the same percentages for most things.

Do you have evidence for this claim? I don’t believe it’s true. Take food, for example, the US government publishes the fact that food spending as a share of income declines as income rises.

https://www.ers.usda.gov/data-products/chart-gallery/gallery...

https://www.ers.usda.gov/data-products/ag-and-food-statistic...