Slum dwellers and "city trash" on one hand, and 150 year old clean shaven organic vegan genetically modified uberlords on the other.
Warlocks vs Elois all over again...
https://www.bls.gov/opub/mlr/2017/beyond-bls/income-and-heal...
They note that the average age of individuals in the middle- and high-income groups has increased since the 1976–80 period, while the average age of those in the low-income group has decreased. Ultimately, individuals from families with top incomes overwhelming report being in good health. Indeed, individuals in this group were more than twice as likely to report being in very good or excellent health than individuals in the bottom group.
If that isn't leading to the scenario described I don't know what you think it's leading to, but it can't be good.
After technology removes another 10-15% of jobs, and we settle into global warming, the population should settle at ~3-4 billion, with ~80% of it being service and maintenance workers, and the rest as the controlling elite.
Not sure what you mean by "hide", but you can sure avoid it. You can even have the worst slums next to incredibly luxurious millionaire houses -- like in India for example, without ever bothering to cross paths.
(An urbanist called Mike Davis has written some very important books on the subject I can recommend, e.g. concerning closed communities in LA, modern slums, privatisation of parts of public urban space to keep the poor out, etc.).