Not a bad idea,
oldpax. But every international agreement requires the USA to agree. The USA is 100% biased in it's own favour. Just like every other country.
Over the last 25 years, we have seen international airline agreements get thrown to the dogs. So I expect that nothing will change. If, one day, it can be categorically proved that:
- enough pax
- on enough planes
- in enough crashes
- have died because of hand luggage carried by others ...
Then regulations will change.