It is pathological to feel the need to have more relative to others in order to feel fulfilled, motivated, satisfied, etc. Wanting to fulfill desires beyond necessities is quite healthy. Wanting everyone else to be capable of doing so is also healthy. Insisting on having greater income and therefore greater opportunities relative to others is pathological.
[WS:] Why is it pathological? Having more than others is one of the principal means of acquiring a higher social status in humans, and achieving higher social status is very natural in the sense of existing in virtually all species. All pack animals have varying degrees of status in their groups. Humans are no exceptions. Achieving that status through material possession is no fundamentally different, and maybe even slightly more desirable than achieving it through physical violence (as it is often the case in animal groups.)
Wojtek