From farmers and other business people. I'm not claiming businesses are unimportant, simply that bankers are (because they redistribute that capital as loans to potentially successful new enterprises).
A less snippy response is bankers are distributing the same finite pool of money so having twice as many bankers might make thing more efficient but it's not going to increase the available Capitol any time soon, ditto for having half as many bankers. Banking is important, but it's also highly automated.