DZ
Whether or not more high net worth individuals exist in the US, more of them exist in SD than 15 years ago. Alot of these folks arent extravagent spenders and were living in the same 1970’s/1980’s home they bought in the 90’s in NCC. A new class of homes oand communities started getting built in the late 90’s and it appealed to many of them who moved up. There are others who didnt but now see a good opportunity to do so. There is also an influx of these folks into the area that occurs regularly from outside of CA as well as the country. Some are inheriting money. Some are lifelong bachelors who finally settle down. Some hit it big with a business. Some finally get down decades of education, fellowships and residencies finally making partner and hitting it big.
You need to open your eyes to appreciate it. IT IS NOT ONE THING that you can put your finger on it is many things. It is life and there are people out there with more money than you. There always will be just like there will be those with less. Argue as you might the evidence overwhelms your feelings.