If there was interest in achieving high compliance and the expect reduction in mortality, why wouldn't it be sufficient to randomly spot check hospital staff ha

If there was interest in achieving high compliance and the expect reduction in mortality, why wouldn't it be sufficient to randomly spot check hospital staff hands for infectious agents and have a program of escalating fines then suspensions followed by loss of license for persons who are consistently above-threshold? The aggressiveness could be gradually increased over time to prevent a disruptive loss of workforce given the existing poor practices.