In the workplace also, I felt this is required, particularly for contract labor with instructions from the supervisor for the work. The supervisor will not be able to be present at all times in all works, but his instructions about the work, work procedure, hazards, protective measures, etc will help in the execution of the work safely.
People find excuses for not being able to monitor the work, complain about the workload, non-cooperation, etc. But, it is the supervisor's responsibility to ensure safety and should have proper plan for it.
