Is "wealth" the right comparison when you are talking about affording rent and food? I think it is spending that matters. There is an approximately fixed amount

Is "wealth" the right comparison when you are talking about affording rent and food? I think it is spending that matters. There is an approximately fixed amount of land in the world, an approximately fixed amount of housing and food that can be produced per year. Jeff Bezos has a lot of wealth, but it's just a number and doesn't affect anyone else unless he spends it, using it to consume a portion of the world's available resources and thus increasing the price of them for everyone else.