Personally, there was a point where I had / was making enough that I felt the need to conceal that fact from people, particularly when I first met them. This meant that I had to go as far as to conceal much of what makes me who I am from people, as some of my hobbies are rather expensive. That was the point where making more meant that I became progressively less happy.
First and most importantly, because I want to be sure people aren't dating/befriending me because of what I have. This is unfortunately something I've already experienced a couple times.
Second, because my experiences with many other people in my wealth/income bracket have driven me to try to avoid being anything like them or having other people view me the way I view some of them.
