I have lived in Chicago, London, and now Doha Qatar and travelled the world. I promise you the wealth here dwarfs what you see in the US. The US might have quite a few wealthy people, sure.. but as a whole it is a very small percentage of the population. Qatar is the highest per-capita GDP in the entire world.
In the US, you see joe blow driving his Honda Accord or whatever budget family sedan. Here, the daily beater car for the locals is the $80k+ Land Cruiser. And when I say beater, I mean they are completely dispensable trucks. They are beaten and battered in the desert dune bashing and replaced like you and I would replace an old pair of shoes. The evening / weekend cars are their toys. Ultra exotics like Brabus Mercs, modified Aventadors, etc are the norm. 911s and BMW M cars are boring by the standard. You can't go more than a block without spotting a 100k+ car each and every single day.
So yea, the US with its massive population has a bunch of rich but I would argue the consumption of the wealthy here is far far greater than the wealthy of the US.
You can look at the classified ads here and quite often see these cars with <2000 miles on them being resold. It's just someone that's grown bored of their toy of the month and have bought something else.
Honestly, it is a level of gross spending unlike I have seen anywhere else in the entire world.