"Malfeasance" is the general term for doing something bad (usually professionally) for your own gain (or your own laziness), that can end up harming others, but where this is not the goal per se, just something that is an "acceptable loss" for your gain. An engineer who doesn't bother to verify the safety of a design before signing off on it, is committing malfeasance.
We distinguish this from "malice", which is when you do something with the direct intent to cause harm. An engineer who verifies that a design causes harm, and signs off on it because they want to cause harm, is being malicious.
Malfeasance is a crime, but it's one we actually can't catch very well, which is the reason we can't "do statistics" on it. Unlike with murder (where we almost always know that somebody caused someone's death, even if we don't know who; and therefore we can work out the statistics even without resolving the perpetrators); we have no idea (without thorough, expensive investigations that don't usually happen) how many of the e.g. buildings that fell over, fell over because of malfeasance, rather than because of a complex accident.
We distinguish this from "malice", which is when you do something with the direct intent to cause harm. An engineer who verifies that a design causes harm, and signs off on it because they want to cause harm, is being malicious.
Malfeasance is a crime, but it's one we actually can't catch very well, which is the reason we can't "do statistics" on it. Unlike with murder (where we almost always know that somebody caused someone's death, even if we don't know who; and therefore we can work out the statistics even without resolving the perpetrators); we have no idea (without thorough, expensive investigations that don't usually happen) how many of the e.g. buildings that fell over, fell over because of malfeasance, rather than because of a complex accident.