> For starters, the security issue won't go away by moving to a new place and living a middle class lifestyle under a new name, so they still would need to maintain that security staff which would make them obviously not middle class.

There are plenty of rich people who are completely unknown.

The inside of their house is a bit better decorated, and if they fly first class to a private resort, how are the neighbors going to know?

Wise people avoid the hedonic treadmill (https://en.wikipedia.org/wiki/Hedonic_treadmill), independent of their level of wealth.