Why? Feeling envious is just human nature. Sure, one can argue that in our current society that kind of feeling is "bad", and we should "fix it". I tend to agree, but that you find it bizarre, it's bizarre to me :D
Oh well, maybe you are a machine (based on your nickname), so yeah, machines do not have imperfections (just kidding).
Let me tell you how I had envied my cousin when he had a Super Famicom (a.k.a. SNES in North America) with a stash of great games and I didn't (not even the base machine), when I was a kid. He never wronged me. In fact, we were really good buddies when we lived next to each other more than 20 years ago, but I still envied.
I guess you're a saint and the rest of us are just dirty sinners haha.
Envy, as I stated, is just an emotion. What the person does with it is where the moral and ethical sides come into play.
If it pushes me to do better in my life, I'll almost certainly mature past that emotion.
Someone else mentioned meditation and I heartily agree, mindset is how you approach the emotions.
"Anger is a great servant but a terrible Master" -- some guy in a fantasy novel
Or maybe it's not and that's just something you tell yourself to feel better about being an asshole.
To me, simply feeling envy (or any negative emotion) doesn't really say anything about the person. Actively stoking negative emotions or acting on them moves the needle in the direction of asshole, though.