Hillary is indeed in a position where she has to claim to be super-human and immune to influence because the ramifications of acknowledging her influences are too problematic. But I want people to be more offended and distrusting over her claims of super-human objectivity than over her (still quite troubling) Wall Street connections. But I'll admit that isn't likely the case. I hope we'll keep working to educate the general public about basic science of human psychology and conflicts-of-interest…
Anyway, apologies for misconstruing your comment.
In Australia, I believe that the biggest companies can gain favour with unspoken pressure (threats of capital flight, unfavourable advertising, etc) as much as any donations. One politician recently suggested that there are 10 companies which basically dictate terms in this country: four banks, two supermarket giants, three mining giants and a telco.
While Sanders might play a straight bat (cricketing term I think, but you can guess the meaning) you can bet Clinton's potential GOP opponent down the track will not at all. Hell, even amongst the Republican candidates it's an out and out poo-flinging war.