They have to follow the laid down rules and regulations of the organization because even before your employment rules and regulations has been set in place to keep the Stanly of company and this can never be changed overnight..
Company rules should be followed to the last detail. Uniform makes staff different from guests and makes them feel ' equal' with fellow co workers. Imagine a scenario where all staff are in different casual outfits! Uniform and name badge should be worn at all times whilst on duty.