Why is it not permissible to use wire for tying bundles?

Using wire for tying bundles is not permissible primarily because it may pose a danger to other passengers. Wire can be sharp and could result in injuries if someone were to accidentally come into contact with it. Moreover, wire can lead to entanglement hazards, which could compromise safety within the station and on trains. It is crucial for train operators and staff to maintain a safe environment for all passengers, and using materials that could potentially cause harm is strictly avoided.

The other considerations regarding cost, efficiency, and clutter do play a role in operational decisions, but the safety of passengers takes highest precedence in transportation settings. Ensuring that the materials used in handling luggage or bundles do not introduce hazards is paramount for compliance with safety regulations and to provide a secure environment for everyone involved.