If the wealth gain was less sudden, i.e. if it was less conspicuous, people wouldn't complain as much. So the speed is definitely related to the happiness of ot

If the wealth gain was less sudden, i.e. if it was less conspicuous, people wouldn't complain as much. So the speed is definitely related to the happiness of others, because it's a relative, societal judgment. Furthermore, the one complaining here (the article) was, I believe, a bystander. It's more a reflection on income disparity than quality of life. But I agree with you.