To the extent that we can infer desire for salary optimization by choice of major, I'd exclude humanities, social sciences, math and physical sciences (research is not particularly lucrative), and education. Those, taken together, are 46.4% of undergraduate degrees in 2011-12. CS, engineering, and business, on the other side, are 28.6% of undergraduate degrees [1].
Consider how arrogant it is to look at the history and present of human civilization, its institutions and customs and art and languages, what it claimed to know and how, what it fought for and why, who held power and how people thought about its legitimacy, what it valued and worshipped, and think "Nope, nothing there could possibly be interesting or important here beyond what engineers can discover in their spare time. Nobody should bother studying any of this." I'm glad there are people who disagree with you.
I never said it wasn't worth studying. Consider how arrogant it is to say that liberal arts are for teaching people how to think critically, implying that hard sciences, math, and engineering are just producing thoughtless drones for work.
Consider how arrogant it is to look at the history and present of human civilization, its institutions and customs and art and languages, what it claimed to know and how, what it fought for and why, who held power and how people thought about its legitimacy, what it valued and worshipped, and think "Nope, nothing there could possibly be interesting or important here beyond what engineers can discover in their spare time. Nobody should bother studying any of this." I'm glad there are people who disagree with you.
[1] https://nces.ed.gov/programs/digest/d13/tables/dt13_318.20.a...