No, according to the hedonic treadmill theory, people in general have a tendency to return to their own previous happiness level. The hedonic threadmill doesn't say anyting about comparing happiness levels across individuals.
So how should we treat chronically ill people? As I have some in my circles, and would actually appreciate insight.
Exactly, so if you're well, but then you contract a chronic illness, one that leaves you in constant pain, you'll eventually "return to your own previous happiness level" right? So no big deal?