I don't really get this, you still have to go outside once in a while as an ultra rich person surely? Why not spend some relatively tiny amount of resources on fixing terrible roads + picking up trash + healthcare for the homeless? Does this happen and I just don't know about it?
Because "wealthy" is relative. Because the sort of people who do that stop at just "rich;" they don't make it to "super-rich."
healthcare for the homeless means seeing more homeless. It’s much more effective to let them die.
In India, you've got lots of relatively-speaking well-off people. And extreme poverty that would shock and boggle the mind. Poverty worse than in sub-Saharan Africa. Millions of the "middle class" (which is just making over $12k USD a year) literally drive their cars through impoverished streets into their homes.