I don't believe it's just about how your comport yourself to clients, but also to establish a hierarchy and pecking order within the organization itself.
The employer may feel that the caliber of people they are hiring requires a very strict, by-the-books mode of operation, and forcing uniforms of people goes a long way towards showing who's in charge, and enforcing discipline.
The employer may feel that the caliber of people they are hiring requires a very strict, by-the-books mode of operation, and forcing uniforms of people goes a long way towards showing who's in charge, and enforcing discipline.