enign grad vs biz grad

I have heard many stories of how much the biz grad are earning in banks. I have a friend who went to do a private business degree(1 yr of bridge course and 3 yrs of uni course) without going through poly or JC. After getting his degree, he became a fund manager in a bank and earning more than 3k a month. His sister who did a NUS business degree is also a fund manager now and she's earning 10k a month. This kind of saddens me as to why am i studying so hard, so lifelessly in the freaking competitive engin sch with the freaking hardworking china man and scholars. Money is not all that matters in life but it does matter quite a lot. And this phenomenon demoralises me as it shows what i have been working so hard for is actually not that worthwhile in today's world. Now i understand why people said it's harder to get into Biz course nowadays.