[The Gaijin]

Look at the age of most public school buses. Most are fairly new. Most used ones are sold off the the third world..

If this was implemented, it would be done for new buses. Present seat height and configuration pre-supposes no use of seatbelts. Retofitting is a non-starter, for insurance liablity reasons alone.

Common experience tells us seat belts are a good thing. But busses are very different from cars.