Let's say a civil engineer helps build a house and the developer puts it on the market for sale.

Do you need a house? Yes. But before you can get the house, what do you really need? Ans: YOU NEED A LOAN. No loan no house.

Let's say a mechanical engineer aids in building a car and the manufacturer puts it on sale.
Do you need a car? No, but you surely would like to have one. What do you need?
Ans: AUTO Loan.

How about both the developer and the manufacturer? What they need? They need working capital. They can issue shares or take a loan.. from who? Ans: Banker

So bankers manufacture alot of Products that society NEEDs.

We manufacture Dreams. Rather, we manufactur the product you need to obtain all your Wordly Dreams. So why shouldn't we get paid more than the Engineer?