Although conflicts of interest do not inevitably lead to unethical conduct, they raise the probability that it will occur. Just as a tornado watch indicates that conditions are favorable to the formation of a twister, a conflict of interest evinces conditions favorable to unethical decisions. Interests conflicting in a conflict of interest pit an obligation against either another obligation or self-interest. That is to say, such conflicts tend to involve deontology and egoism.
The full essay is at Institutional Conflicts of Interest, available at Amazon.