Wall Street, like all most every industry "invests" in both parties all the time. That's a fact. To see if these contributions actually mean anything, one would need to look at what these industries have received in exchange for their money.
So I'll ask again; what has Wall Street received for their contributions to hillary? We aren't talking about bill clinton, we are talking about hillary.
She was in support of the Mexican bailout, supported and voted for the bailout in 2008. In her speeches from what we do know she is not huge on reform. She is not Bill but she supports most of his policies.
But, is your point that wall Street gives her millions with no expectation in return? Wall Street supports people on both sides but not all on both sides. There is this gaping hole that you need to fill logically. What do the bankers expect in return? You seem to be saying they expect nothing.