I agree we should not let the rich and powerful corrupt our government. I don't know your mind, but I have heard this argument before, usually by folks who consider such efforts to be government overreach. This also ignores the placement of burden in such a corrupting influence; that it is the fault of government allowing itself to be corrupted, not the "selfish striving" person/business/organization. I guess amoral sociopathic behavior is permitted behind the corporate veil and there is nothing that can or should be done about it.
[0] From Ron Chernow's biography of Alexander Hamilton.
This is such a weak characterization of the argument. What are you proposing we do to sufficiently punish people who have broken no laws? You can't effectively police individuals or corporations according to unwritten rules, so write good rules and fix them when they fail. That's what can and should be done about it!