Certainly not limited to IT. One of my professors from many years was an aerospace engineer^1^. He recounts to us the time that he busted his ass on some design for a long time and managed to save a ton of money with his design. And then after it was done he realized that all he really did with his extra hard work was help some executives and stockholders get richer. Not long after that he switched to education.

^1^Not in the defense industry