The oversized influence that American corporation have in government is already an issue, but The Atlantic has an article this month that expands beyond that to discuss the degree to which Russian kleptocracy is being facilitated by American banks and law firms. The article Kleptocracy is on the rise in America will (or at least, should) alarm us.
As I argued in my just competed series on foreign policy, the American empire is far more likely to be destroyed by internal corruption than by the rise of any external competitor. And this is just the sort of creeping corruption that could do it!