I wish I could pull it up, it had much more coarse grained categories than what you linked and long time periods. It might have been a meta study. For example

I wish I could pull it up, it had much more coarse grained categories than what you linked and long time periods. It might have been a meta study. For example in one of the links they discriminate food away from home etc. It's not the one I'm remembering but it looked a bit like this one: https://flowingdata.com/2018/02/08/how-different-income-groups-spend-money/ https://flowingdata.com/2018/02/08/how-different-income-grou... It looks rather proportional. But I have to admit, here housing is fatter at the low and. Personal insurance/pension gets fatter the more you move up. Education is interesting as it is fat at the very low end, gets thinner for a bit, but after the lower middle gets fatter again continuously. It also cuts off after 200k yearly income, so there's that.