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As it is written, the sentence "More than half of the suicides were committed by just five percent of patients." is as silly as "Sixty percent of the time, works every time."
This is the entire purpose of punitive damages. It is impossible to catch someone every single time. The punitive damages are to make it be so costly that one time that they are caught that the entire practice must stop. A $3500 fine is an absolute joke when the stolen wages are over ten times that amount.
The closest mathematical structure I can see would be an unordered set whose elements are individual servers, but this is so generic of a structure as to be entirely useless.